1. Papiso
Tlaleho ena e ikemiselitse ho hlahloba ka botlalo le ho sekaseka ka botebo maemo a fapaneng a ts'ebeliso ea litselana tsa tšireletso mebileng ka har'a lits'ebetso tsa ts'ireletso ea mebileng. Joalo ka lits'ebeletso tsa bohlokoa tsa polokeho ea sephethephethe, li-guardrails li sebetsa ho feta ho itšehla thajana. Li fokotsa kotsi ea likotsi tsa mebileng haholo 'me li fokotsa likotsi ka ho monya matla a ho thulana, ho tataisa likoloi hantle, ho tataisa bakhanni ba bona le ho thibela batho ho tšela ba tsamaeang ka maoto. Tlaleho e tla hlakisa melao-motheo le maikutlo a ho kengoa seporo sa literene tikolohong e tloaelehileng ea litsela tse kholo joalo ka mathōko a litsela, bohare ba bohareng, le menyako/ho tsoa ha borokho le kotopo, ho fetela lits'ebetsong tse khethehileng tsa litselana tsa makoloi tse tsamaeang ka maoto le tseo e seng tsa makoloi litseleng tsa litoropo.
Moralo le khetho ea lithaelese tsa balebeli ha lia theoa holim'a ho nahanoa ka mokhoa o le mong empa li fetoloa ka matla ho latela lintlha tse fapaneng joalo ka litšobotsi tsa geometri ea tsela, bophahamo ba sephethephethe, sebopeho sa koloi le likotsi tse ka bang teng tsa likotsi. Ka mohlala, matsoapong a nchocho, matsoapong a moepa, kapa likarolong tse phahameng tsa mathōko, boemo ba tšireletso bo lokela ho phahamisoa ka tsela e loketseng. Ho feta moo, nts'etsopele e tsoelang pele ea theknoloji ea guardrail, joalo ka ts'ebeliso ea meqomo e potolohang e thibelang ho thulana le meqomo e kopantsoeng, e bonts'a tlhahlobo e tsoelang pele ea boenjiniere ho ntlafatsa ts'ebetso ea polokeho, ho ntlafatsa ts'ebetso ea ts'ireletso, le ho netefatsa ts'ebetso ea tikoloho. Lintlafatso tsena li bontša mokhoa o lebisang kahong ea meralo ea motheo e bohlale le e tšoarellang.
2. Selelekela
2.1 Seabo le Bohlokoa ba Litlhokomelo Mekhoeng ea Tšireletso ea Paballo Mebileng
Li-Highway guardrails ke karolo ea bohlokoa ea polokeho ea litšebeletso tsa sejoale-joale tsa lipalangoang, 'me mosebetsi oa tsona oa mantlha ke ho netefatsa ts'ireletseho ea basebelisi ba litsela ka mafolofolo kapa ka boikemelo. Ho latela pono ea ts'ireletso, mosebetsi o ka sehloohong oa ho sireletsa likoloi ke ho thibela likoloi tse tsoileng taolong hore li se ke tsa kheloha tsela eo li reriloeng ho eona, ho li qoba hore li se ke tsa matha ka thoko ho tsela, ho kena litseleng tse hanyetsanang, kapa ho oela libakeng tse kotsi tse kang marokho kapa meaho e phahameng, ka hona ho thibela likotsi tse matla tsa sephethephethe. Mochine ona oa tšireletso o monya matla a mangata a hlahisoang nakong ea ho thulana ha likoloi 'me o etsa bonnete ba hore likoloi li thibiloe kapa li tsamaisoa hantle ka mor'a tšusumetso, kahoo li fokotsa likotsi le tšenyo ea thepa.
Leha ho le joalo, mosebetsi oa ho sireletsa o fetela ho feta mona. Li boetse li fana ka ts'ebetso e sebetsang ea tataiso ea polokeho, mohlala, ka sebopeho sa bona se tsoelang pele se tataisang pono ea mokhanni, haholo bosiu kapa maemong a mabe a leholimo a sa bonahaleng hantle, a fa bakhanni meeli e hlakileng ea litsela le tataiso ea tataiso. Ka nako e ts'oanang, joalo ka lits'ebeletso tsa ho itšehla thajana, litšiea li thibela batho ba tsamaeang ka maoto ho tšela litselana tsa makoloi ntle le khethollo, ho boloka taolo ea sephethephethe le ho netefatsa polokeho ea batsamai ka maoto. Karolo ena e 'meli - ts'ireletso e sa sebetseng le tataiso e sebetsang - e kenyelletsa molao-motheo oa "boikutlo ba batho, polokeho pele" moralong oa polokeho tseleng. Molao-motheo ona o etelletsa bophelo ba motho pele 'me o fokotsa kotsi, o feta feela sets'oants'o sa sebopeho kapa sephethephethe, 'me o fetoha boleng ba sechaba bo kenelletseng kahong ea meaho. Moralo oa Guardrail ha o shebane feela le karabelo e matla ea koloi nakong ea likotsi empa hape o shebana le maikutlo a boitšoaro ba batho le maikutlo, kahoo e theha mokhoa o phethahetseng le o ntlafalitsoeng oa ts'ireletso ea polokeho tseleng.
2.2 Maikemisetso a Tlaleha, Bophara, le Sebopeho
Tlaleho ena e ikemiselitse ho hlahloba ka botlalo maemo a ts'ebeliso ea litselana tsa balebeli ba litsela tse kholo libakeng tse fapaneng tse rarahaneng, ho sekaseka ka botebo litšoaneleho tsa bona tsa ts'ebetso, melao-motheo ea moralo, le lintlha tsa khetho. Bophara ba tlaleho bo tla akaretsa likopo tsa tšireletso litseleng tse kholo, mebileng ea litoropong, le taolong ea nakoana ea sephethephethe, 'me e tla hlahloba phello ea bona polokehong ea makoloi, bapalami ka maoto le makoloi ao e seng a makoloi. Sebopeho sa tlaleho se tla qaqisa ka mokhoa o hlophisitsoeng mabapi le ts'ebetso ea ts'ebetso ea ts'ireletso, lihlopha, maemo a tloaelehileng a ts'ebeliso, menahano ea moralo, le nts'etsopele ea nako e tlang, ho leka ho fana ka tšupiso e nang le matla le e sebetsang bakeng sa litsebi mafapheng a amehang.
3. Mesebetsi ea Motheo le Khethollo ea Balebeli
3.1 Mesebetsi e ka Sehloohong ea Tšireletso ea Balebeli
Guardrails e bapala likarolo tse ngata tsa bohlokoa polokehong ea sephethephethe litseleng, ka mesebetsi ea bona ea mantlha e kenyelletsang:
- Ho thibela ho kheloha ha koloi, ho kenella, ho solla, kapa ho matha ka tlase: Ena ke ts'ebetso ea mantlha le ea bohlokoa ka ho fetesisa ea litepisi. Ha koloi e kheloha tsela ea eona e tloaelehileng ea ho khanna ka lebaka la mabaka a fapaneng (mohlala, ho lahleheloa ke taolo, ho khanna ka mokhathala, ho matha ka lebelo le phahameng), literene tsa balebeli li ka e thiba hantle, tsa thibela koloi ho tsoa ka thoko ho tsela, ho kena litseleng tse hanyetsanang, kapa ho oa ho tsoa libakeng tse phahameng joalo ka marokho kapa meaho e phahameng, ka ho etsa joalo ho qoba likotsi tse mpe le ho feta.
- Ho monya matla a ho thulana ho fokotsa tahlehelo ea likotsi: Li-Guardrails li etselitsoe ho monya matla a koloi a ho thulana ka sebopeho sa tsona kapa, maemong a mang, ka ho qobella koloi ho hloa. Mokhoa ona oa ho monya matla o fokotsa haholo matla a amang koloi le bapalami ba eona, ka hona o fokotsa likotsi le tšenyo ea thepa. Moqapi oa Guardrail ha o shebane feela le ho thibela likoloi ho tloha tseleng empa, habohlokoa le ho feta, ho laola liphello ka mor'a hore koloi e tlohe tseleng, ho kenyelletsa le ho fokotsa likotsi tsa batho ba kenang le ho thibela likotsi tsa bobeli. Sena se bontša hore moralo oa guardrail o kenyelletsa kutloisiso e rarahaneng ea matla a koloi le biomechanics ea batho ho fihlela sephetho se sireletsehileng maemong a ho thulana.
- Ho tataisa koloi le ho boloka boemo bo tloaelehileng ba ho khanna: Balebeli ba lokela ho ba le bokhoni bo botle ba ho tataisa, ho bolelang hore ka mor'a hore koloi e thulane, ba lokela ho e tataisa hantle hore e e khutlisetse moo e eang teng, ho thibela koloi ho phethoha, ho reteleha, kapa maemo a mang a kotsi a ka lebisang likotsing tsa bobeli. Ts'ebetso ea "buffering" le e tataisang ea li-guardrails ke matšoao a bohlokoa a ts'ireletso ea bona.
- Ho tataisa pono ea bakhanni le ho thibela tsela ea ba tsamaeang ka maoto: Popeho e sa khaotseng ea litselana tsa ho lebela e bohlokoa bakeng sa ho tataisa pono ea mokhanni, haholo-holo bosiu kapa maemong a mabe a leholimo, kaha e ntlafatsa ponahalo ea litsela le ho thusa bakhanni ho boloka tsela e nepahetseng ea ho khanna. Ka nako e ts'oanang, joalo ka tšitiso ea 'mele, li-trail rails li thibela batho ba tsamaeang ka maoto ho tšela tsela ntle le khethollo, kahoo ba boloka taolo ea sephethephethe le ho netefatsa polokeho ea batsamai. Ho nahanoa ka lintlha tsena tsa tikoloho (joalo ka ho benya ha lebone la pele) le boitšoaro ba batho (ho bona ha mokhanni, ho tšela batho ba tsamaeang ka maoto) ho eketsa sebaka sa ts'ebetso ea litselana tsa tšireletso, ho li etsa karolo e fapaneng ea taolo ea likotsi ka har'a sistimi ea polokeho ea mebileng, ntle le ts'ireletso ea 'mele feela ea ho thulana.
3.2 Mefuta ea Sebopeho le Litšobotsi tsa Balebeli
Li-Guardrails li tla ka mefuta e fapaneng ea meralo, 'me khetho ea tsona hangata e ipapisitse le tikoloho ea litsela, litlhoko tsa moralo le boemo ba ts'ireletso bo lebelletsoeng. Ho ipapisitsoe le boemo ba deformation ka mor'a ho thulana, li-currentrails li ka aroloa ka mefuta e thata, e thata-thata le e tenyetsehang.
- Litlhokomelo tse thata:
- Moemeli ea ka Sehloohong: Litšiea tsa konkreite.
- litsobotsi: E tiile ka sebopeho, ha e holofale ha bonolo, e monya matla a ho thulana ka ho qobella koloi ho hloa. Ka lebaka la tlhaho ea bona e thata, li thibela ho kena ha koloi, empa phello ea koloi le bapalami nakong ea ho thulana e ka ba ea bohlokoa.
- Maemo a Tloaelehileng a Sebetsang: E loketse likarolo tseo ho tsona ho hlokahalang hore ho be le ho fokotseha ho fokolang kapa ho thulana ha matla a mangata, joalo ka bohare ba litsela tse kholo, mahlakoreng a ka ntle a marokho, le likarolo tse nang le karolo e phahameng ea likoloi tse kholo.
- Semi-Rigid Guardrails:
- Moemeli ea ka Sehloohong: Likarolo tsa tšireletso tsa W-beam le litšiea tsa mabokose a mabokose.
- litsobotsi: E-ba le sekhahla se itseng sa ho fetoha ha matla, ho monya matla ka mokhoa ona, ha o ntse o e-na le tataiso e ntle, e lumellang likoloi tse thulang hore li khutlele tseleng ea tsona e tloaelehileng ea ho khanna. W-beam guardrails ke mofuta o atileng haholo.
- Maemo a Tloaelehileng a Sebetsang: E sebelisoa haholo litseleng, li-medians tse bohareng, le maemo a mang a fapaneng, haholo-holo likarolong tse hlokang ho leka-lekana pakeng tsa ts'ebetso ea tšireletso le sebaka se itseng sa deformation.
- Flexible Guardrails:
- Moemeli ea ka Sehloohong: Lisebelisoa tsa cable.
- litsobotsi: E tšehelitsoe ke likhoele tse tiisitsoeng (liropo tsa tšepe), tse nang le matla a maholo a ho senyeha, tse monyang matla a ho thulana. Monyetla oa bona o molemong oa ho thibela le ho fokotsa tšenyo ea koloi. Leha ho le joalo, ka lebaka la ho senyeha ha tsona ho hoholo, ha li tšoanelehe bakeng sa likarolo tse nang le radii e nyenyane ea curve.
- Maemo a Tloaelehileng a Sebetsang: E loketse likarolo tse hlokang sebaka se seholo sa buffer le moo litlhoko tsa deformation li batlang li fokola.
Lintlha tsa Tlatsetso ka Liforomo tse Tloaelehileng tsa Sebopeho:
- Litlhokomeliso tsa W-beam: Mofuta o tloaelehileng ka ho fetisisa oa thibelo ea tšireletso, e nang le maballo a marang-rang a marang-rang le litšehetso tsa cylindrical, tse nang le melemo ea ho kenya lisebelisoa tse bonolo le tse bonolo le litšenyehelo tse batlang li le tlaase.
- Box Beam Guardrails: Sebelisa tšepe e bōpehileng joaloka lebokose e le maballo a loketseng bakeng sa likarohano tse moqotetsane.
- Litlhokomelo tse kopantsoeng: Kopanya melemo ea lisebelisoa tse fapaneng kapa mefuta ea meralo, joalo ka litšepe tsa tšepe tse kopaneng tsa W-beam. Li-Guardrails tsena li ikemiselitse ho leka-lekanya merero e mengata ea meralo, joalo ka ho fihlela bokhoni bo phahameng ba ho thibela ho thulana (mohlala, boemo ba SBm) ha ho ntse ho sebelisoa bophara bo fokolang ba ho khanna, ho fana ka lintlha tse ntle, ho le bonolo ho kenya, le ho ba le litšenyehelo tse tlase. Leha ho le joalo, hoa lokela ho hlokomeloa hore esita le litšiea tse tsoetseng pele tse kopantsoeng li na le meeli e tobileng ea bokhoni ba tsona ba ho itšireletsa. Mohlala, bakeng sa li-semi-trailer tse boima tsa lithane tse 49 tse nang le matla a maholo a kinetic a qalang, li-Guardrails tsa W-beam li kanna tsa sitoa ho monya matla ka botlalo ka ho fetoha ha tsona le ho li thibela ho kenella bohareng ba bohareng.5 Sena se bontša hore ha karolo ea likoloi tse boima ka har'a sebopeho sa sephethephethe e ntse e eketseha, theknoloji e teng ea guardrail e ntse e tobana le mathata, a hlokang hore ho be le boqapi bo tsoelang pele ba theknoloji ho sebetsana le maemo a ho thulana ho feteletseng.
Lisebelisoa tsa Thuso:
Ntle le sebopeho sa mantlha, litsamaiso tsa balebeli hangata li kopanya lits'ebeletso tse fapaneng tsa tlatsetso ho ntlafatsa ts'ireletso tseleng:
- Lisebelisoa tsa Anti-glare: E kentsoe litsing tsa tšireletso tse bohareng, joalo ka li-anti-glare panels, anti-glare panels, metal net, kapa lifate tse lenngoeng bohareng (mohlala, privet, azaleas), ka sepheo sa ho thibela mahlaseli a tsoang maboneng a koloi a tlang hore a se ke a ama bakhanni, ho etsa bonnete ba hore sephethephethe sa bosiu se sireletsehile. Ka mohlala, ka lehlakoreng le ka hare la marokho, ntle le likarolo tse nang le marang-rang a khahlanong le litter, likarolo tse ling li ka kenngoa ka resin e tala ea maiketsetso kapa li-fiberglass anti-glare panels, tse nang le li-angles tse khethehileng tsa anti-glare.
- Lisebelisoa tsa Buffer: Joalo ka meqomo ea li-buffer (hangata lijana tsa polasetiki tse tšehla tse tlatsitsoeng ka metsi), libarele tse thibelang ho thulana, kapa li-cushion tse kentsoeng pele ho meaho e tsitsitseng joalo ka mathōko a tsela, lipiere tsa tsela, kapa matšoao a tsela, a sebelisetsoang ho fokotsa sekhahla sa ho thulana ha likoloi le ho thibela likotsi tsa batho ba ka har'a bona.
- Lisebelisoa tsa Temoso: Mabone a benyang a kentsoeng moo litsela li arohaneng ho lemosa bakhanni ba libaka tsa makala. Lipalo tsa lehloa li kenngoa ka lehlakoreng le letšehali le bohareng ba litsela e le tataiso ea pono le sepheo sa mosebetsi oa ho tlosa lehloa ha ponahalo e fokola ka lebaka la sefefo sa sefefo.
Letlapa la 1: Mefuta ea Guardrail, Litšobotsi tsa Tsona tsa Bohlokoa, le Maemo a Tšebeliso.
| tlhophiso | Mofuta oa Moemeli ea ka Sehloohong | litsobotsi | Maemo a Tloaelehileng a Tšebeliso |
| Guardrails e thata | Guardrails ea Konkreite | E sa holofalang habonolo; e monya matla ka ho qobella likoloi ho hloa; boemo bo phahameng ba tšireletso, empa bo ka baka tšusumetso e kholo ho likoloi le ho bapalami; e loketseng bakeng sa tlhokomelo. | Bohareng ba bohareng; mahlakore a ka ntle a marokho; likarolo tse nang le palo e phahameng ea likoloi tse kholo; likarolo tse hlokang deformation e fokolang. |
| Semi-Rigid Guardrails | Balebeli ba W-beam, Box Beam Guardrails | Ho ba le deformation e itseng holim'a tšusumetso, ho monya matla ka ho fetoha; tataiso e ntle; mofuta o tloaelehileng haholo; tlhomamiso e bonolo le e loketseng, theko e batlang e le tlase. | Mathoko a litsela; ba bohareng; li-curve; li-medians tse tšesaane (lebokose la lebokose). |
| Balebeli ba Flexible | Cable Guardrails | Ho ba le matla a bohlokoa a deformation, ho monya matla a ho thulana; ho sireletsa ka katleho, ho fokotsa tšenyo ea koloi; ha e loketse likarolo tse nang le radii e nyane ea curve. | Likarolo tse hlokang sebaka se seholo sa buffer. |
| Li-Guardrails tse kopantsoeng | Lisebelisoa tsa tšepe tsa W-beam tse kopantsoeng, Metal Beam-Column Guardrails | Kopanya melemo ea lisebelisoa tse ngata kapa meaho; ho ba le bophara bo fokolang ba ho khanna, litsela tse ntle tsa ho bona, ho kenya habonolo, litšenyehelo tse tlaase; e ka finyella litlhoko tsa botle; tšireletso e fokolang khahlanong le likoloi tse boima haholo. | Litsela tsa litoropo; marokho a nang le litlhoko tse khethehileng tsa botle; marokho a sebopeho sa tšepe; makokoana a litsela, mateano a litsela, menyako/ho tsoa ho ama bohole ba pono. |
4. Maemo a Tloaelehileng a Kopo bakeng sa Balebeli ba Tsela e kholo
Ho hlongoa ha litsela tse kholo ho ipapisitse le tlhahlobo e felletseng ea libopeho tsa 'mila, maemo a ts'ebetso ea sephethephethe, likotsi tsa tikoloho, le litlamorao tse ka bang teng tsa likotsi. Maemo a ts'ebeliso ea bona a akaretsa libaka tse ngata tse mahlonoko tse kang litsela, li-medians tse bohareng, le menyako ea borokho le kotopo.
4.1 Melawana le Maemo a ho Hloma Guardrail ka thoko ho Tsela
Maikemisetso a mantlha a ho sireletsa mathōko a litsela ke ho thibela likoloi ho tsoa tseleng, haholo-holo likarolong tseo ho tsona ho ka bang le liphello tse mpe.
- Likarolo tse phahameng tsa li-embankments le tse tlatsitsoeng haholo: Sehlopheng sa II le ka holim'a litsela tse kholo moo letsoapo le bophahamo ba mokoloko li oelang ka har'a libaka tse nang le moriti (Zone I le II), 'me litseleng tse kholo tsa Sehlopha sa III le IV Sebakeng sa I, ho tlameha ho kengoa litselana tse lebelang ka thoko ho tsela ho thibela likoloi ho tsoa tseleng le ho baka likotsi tse matla tsa ho oa. Haeba terene e tsamaea ka ho bapa ka har'a limithara tse 15 ho tloha ka thōko ho tsela, 'me koloi e tlohang tseleng e ka oela holim'a terene e bakang kotsi ea bobeli, ho tlameha ho kengoa le literene tsa tšireletso. Tlhokahalo ena e hlakileng bakeng sa ho ntlafatsa maemo a tšireletso a terekere ho ipapisitsoe le likarolo tsa 'mila (joalo ka matsoele a nchocho, matsoapo, matsoapo a phahameng) e bonts'a leano le matla la taolo ea likotsi. E bontša hore moralo oa guardrail ha o tsitsitse empa o fetotsoe ka matla ho ea ka likotsi tsa tlhaho tsa likarolo tse itseng tsa litsela, ho fetela ka nģ'ane ho "mohlala o le mong oa tšireletso" ho ea ho moralo o hloekisitsoeng o itšetlehileng ka tlhahlobo ea kotsi.
- Case Thuto: Morero oa Gansu G212 le S306 Highway Safety Life Protection o ntlafalitse haholo polokeho likarolong tse kotsi tsa litsela ka ho matlafatsa, ho ntlafatsa, kapa ho nkela sebaka sa litsi tsa tšireletso tse teng, ho felisa ka katleho likarolo tsa Class IV le V tse kotsi haholo.
- Li-Curves tse Sharp, Li-Curves tse Tsoelang Pele, le Likarolo tse telele tsa Moepa: Likarolo tsena li na le tšekamelo ea ho lahleheloa ke taolo ea koloi ka lebaka la ho lumellana ho rarahaneng le bothata ba ho laola lebelo. Ka hona, boemo ba tšireletso bo bohareng bo lokela ho ntlafatsoa ka mokhoa o nepahetseng, 'me litšiea tse ka thōko ho tsela le tsona li lokela ho ntlafatsoa likarolong tse phahameng tsa matamo.
- Case Thuto: Morero oa tsela e kholo ea Henan Jiyuan S240 Jideng Line o ekelitse litšiea tsa konkreite tse tiisitsoeng le litšiea tsa W-beam libakeng tse moepa tse moepa le likarolo tse telele tse moepa, tse tlatselletsoang ke likhoele tse rumble le tsela e mebala-bala e khahlanong le skid. Tšebeliso ena e felletseng ea mehato e mengata ea ts'ireletso, joalo ka sebaka se katiloeng se khahlanong le skid se mebala-bala, li-rumble strips, le motsoako oa meqomo e pota-potileng e thibelang ho thulana le litšiea tsa setso, e bonts'a leano le nang le mekhahlelo e mengata, le kopaneng la ts'ireletso ea ts'ireletso. Sena se bonts'a hore polokeho e nepahetseng ea 'mileng e its'etleha holim'a ts'ebetso ea ts'ebetso (mohlala, litemoso tse bonoang/kutlo) le mehato e sa sebetseng (lithibelo tsa 'mele), ho fapana le ho litebela ka botsona.
- Case Thuto: Tseleng e kholo ea Xinjiang G315, likarolong tse nang le li-curve tse ngata le likoloi tse boima, li-curve tsa W-beam tsa pele li ile tsa nkeloa sebaka ke mefuta ea RG-SA e potolohang e thibelang ho thulana, 'me ho ile ha eketsoa mekotla ea ho paka ka tšohanyetso, hammoho le ho atolosoa ha li-curve, ho senya matla a koloi le ho thibela likoloi ho kena ka har'a lepatlelo.
- Likarolo tse Haufi le Terene, Metsi, Mehaho e Kotsi, kapa Libaka tse Hlokoang: Likarolong tseo seporo se tsamaeang ka mabapa ka har'a limithara tse 15 ho tloha tseleng, 'me koloi e tlohang tseleng e ka oela tereneng e bakang kotsi ea bobeli, kapa likarolo tse haufi le matamo, litsi tsa oli, liteishene tsa motlakase, libaka tsa tšireletso ea mehloli ea metsi a nooang, joalo-joalo, tse hlokang tšireletso e khethehileng, litšepe li lokela ho kengoa kapa boemo ba tsona ba ho thibela ho thulana bo eketsoe.
- Tsoa Libakeng tse Likhutlo-tharo tsa Ramp le Li-Curves tse Nyenyane tsa Radius: Litselang tse kholo le tsa Sehlopha sa I, ho lokela ho kengoa litšiea libakeng tse khutlo-tharo tsa litselana tsa ho tsoa le ka lehlakoreng le ka ntle la li-curve tse nyane tsa radius, kaha likoloi li tloaetse ho kheloha tsela libakeng tsena, tse hlokang tšireletso.
4.2 Melawana le Maemo a ho Kenngwa ha Central Median Guardrail
Litšitiso tse bohareng li sebelisoa haholo ho arola litselana tse fapaneng tsa sephethephethe, ho thibela likoloi ho tšela, hape li fana ka tataiso ea sephethephethe le mesebetsi e thibelang khanya.
- Karohano ea Litsela le Tataiso ea Sephethephethe: Morero o ka sehloohong oa litšiea tse bohareng tsa bohareng ke ho arola litselana tsa sephethephethe ka litsela tse fapaneng (tse otlolohileng) le ho tataisa pono ea mokhanni, ho netefatsa hore sephethephethe se tsamaea ka tlhophiso le se sireletsehileng.
- Mekhatlo ea Bohareng: Ho tlameha ho kengoa lithupa tse bohareng tse bohareng litseleng tse kholo ho koala menyetla, ho thibela likoloi ho thinya kapa ho tšela li sa khethe, le ho netefatsa polokeho ea sephethephethe. Bophara ba bohareng ba bohareng ke ntho ea bohlokoa ho nahanoa ka moralo oa guardrail. Sena se bontša hore ho rala litsamaiso tsa guardrail, ho na le bothata ba ho ntlafatsa pakeng tsa ts'ebetso ea sebaka, ho boloka litšenyehelo, le ts'ebetso ea polokeho. Likarolong tsa litsela tse kholo tsa litoropong kapa tsa tikoloho, sebaka sa 'mele oa sisteme ea ts'ireletso ke tšitiso e kholo ea moralo.
- Lisebelisoa tsa Anti-glare: Lisebelisoa tse thibelang ho benya, tse kang li-anti-glare panels, li-anti-glare panels, litšepe tsa tšepe, kapa lifate tse lenngoeng bohareng (mohlala, privet, azaleas), li kentsoe holim'a litselana tse thibelang mahlaseli a kotsi ho thibela khanya e tsoang maboneng a likoloi a tlang hore a se ke a ama bakhanni, ho netefatsa hore sephethephethe sa bosiu se bolokehile ebile se thella. Mehaho e thibelang ho benya e le karolo ea litšitiso tse bohareng tse bohareng li bonts'a hore moralo oa guardrail o ela hloko tšusumetso ea maemo a tikoloho (joalo ka ho benya ha lebone le tlang) ho polokeho ea bakhanni 'me e ka e fokotsa ka litsela tsa tšireletso. Sena se holisa sebaka sa ts'ebetso ea lithaelese ho feta ts'ireletso ea 'mele feela ea ho thulana.
- Case Thuto: Ka lehlakoreng le ka hare la marokho, ntle le likarolo tse nang le marang-rang a thibelang matlakala, li-anti-glare panels li ka kenngoa, tseo hangata li entsoeng ka resin e tala ea maiketsetso kapa fiberglass, e nang le li-angles tse thibelang mahlaseli a kotsi ho thibela khanya ka katleho.
4.3 Maemo a Kopo bakeng sa Balebeli ba Borokho
Ho kentsoe litšepe tsa borokho ho thibela likoloi ho oela marokhong. Mehopolo ea bona ea moralo e rarahane haholoanyane, e hloka tlhahlobo e felletseng ea bophahamo ba borokho, tikoloho e ka tlase ho borokho, bophahamo ba sephethephethe le litlhoko tsa botle.
- Ho Thibela Likoloi ho tloha ho Marokho a Oeleng: Karolo e ka sehloohong ea marako a borokho (joaloka mabota a parapete, ke hore, marako a tiileng a konkreite) ke ho thibela likoloi ho tloha mokatong oa borokho, haholo-holo marokhong a phahameng, libakeng tse nang le metsi a tebileng ka tlase, kapa likarolo tse tšelang liporo kapa libaka tse nang le baahi ba bangata, e leng libaka tse kotsi haholo.
- Bridge Central Medians: Bakeng sa marokho a span e le 'ngoe kapa marokho a nang le maqhama a katoloso feela pakeng tsa liphahlo le matla a lekaneng a mokatong oa ka holimo, litšiea tse bohareng tse bohareng li lokela ho raloa ho supa melao-motheo ea litšiea tse bohareng tse bohareng ba likarolo tsa bethe ea litsela.
- Marokho a Khethehileng:
- Borokho ba Sebopeho sa Litšepe le Ha U Fokotsa Moroalo o Shoeleng oa Borokho oa Hlokahala: Metal beam-column guardrails e khothaletsoa ka lebaka la boima ba bona bo batlang bo le bobebe, bo behang moroalo o fokolang holima sebopeho sa borokho.
- Marokho a nang le Litlhokahalo tse Khethehileng tsa Bokhabane kapa Litsela tsa Litoropo: Metal beam-column guardrails kapa li- guardrails tse kopantsoeng li khothaletsoa ho leka-lekanya botle le ts'ebetso ea ts'ireletso. Maemo a ho khetha bakeng sa litšiea tsa borokho li na le mahlakore a mangata, ha a kenyelle feela ts'ebetso e khahlanong le ho thulana empa hape le boima ba sebopeho (mohlala, ho khetha tšepe holim'a litšiea tsa konkreite ho fokotsa boima ba borokho) le tšusumetso e ntle. Sena se supa hore moralo oa meralo ke bothata bo rarahaneng ba ntlafatso bo hlokang ho leka-lekanya polokeho, litšitiso tsa boenjiniere, le kopanyo ea litoropo/tikoloho.
- Likarolo tse Haufi le Libaka tse Haufi kapa Tse Tšeletseng tse nang le Litlhoko tse Khethehileng tsa Tšireletso: Tse kang liporo tse kholo, matamo, litsi tsa oli, liteishene tsa motlakase, libaka tsa tšireletso ea mehloli ea metsi a nooang, litšiea tsa borokho li lokela ho ba le maemo a khethehileng a ho thulana le ho etsoa ka mokhoa o khethehileng, esita le ho eketsa boemo ba tšireletso ho HB, ho sebetsana ka katleho le likotsi tsa bobeli tse ka bang kotsi. Ka mohlala, bakeng sa marokho a tšelang libaka tse khōlō tse sirelelitsoeng tsa mehloli ea metsi a nooang, marokho a maholohali a fanyehiloeng, marokho a nang le lithapo le marokho a mang a tšehelitsoeng ka likhoele, ho buelloa tšireletso ea boemo ba HB. Tlhokahalo ena bakeng sa maemo a holimo a tšireletso marokhong, haholoholo a tšelang libaka tse hlokolosi , e bontša moralo oa tlhahlobo ea kotsi o sa nahaneng feela ka litlamorao tse tobileng tsa ho thulana empa hape le litlamorao tse ka bang teng tsa tlokotsi (mohlala, ho kheloha ha terene, tšilafalo ea tikoloho). Sena se bontša kutloisiso e tebileng ea likotsi tsa tsamaiso meahong ea lipalangoang.
4.4 Maemo a Kopo bakeng sa Keno ea Tunnel/Litlhokomelo tsa ho Tsoa
Menyako le ho tsoa ha litonnopo ke libaka tse khethehileng tsa phetoho tikolohong ea tsela, 'me ho kengoa terata mona ho hloka tlhokomelo e khethehileng ho feto-fetoha ha pono ea mokhanni le liphetoho tsa boitšoaro.
- Phetoho le Khokahano le Balebeli ba Roadbed/Bridge: Menyako/ho tsoa ho lithanele ke libaka tse kotsing ea kotsi. Li-Guardrails mona li lokela ho raloa ka likarolo tsa phetoho ho netefatsa phetoho e bonolo ea ho satalla, bophahamo, sebopeho sa likarolo tse fapaneng, le boemo bo nang le litselana tsa tšireletso tse haufi kapa tsa borokho, ho qoba likotsi tse ncha tsa polokeho. Tlhokahalo e tlamang bakeng sa "likarolo tsa phetoho" le ho fokotsa halofo ea sebaka sa poso menyakong ea litonnoro/ho tsoa e bontša hore libaka tsena li khetholloa e le libaka tse nang le likotsi tse ngata ka lebaka la liphetoho tsa tšohanyetso tikolohong ea ho khanna (leseli, ponahalo, geometry) le boitšoaro ba bakhanni. Sena se totobatsa bohlokoa ba ho nahana ka lintlha tsa kelello le tsa maikutlo moralong oa litsela, eseng feela litšitiso tsa 'mele.
- Case Thuto: Balebeli menyakong ea likotopo li ka nkuoa e le karolo ea phetisetso ea terena ho tloha betheng ea litsela kapa borokhong ho ea sebakeng sa lebota la kotopo, ho fihlela khokahano e bonolo.
- Case Thuto: Ka har'a limithara tse 16 ho tloha lehlakoreng la kotopo ea menyako/ho tsoa, sebaka sa sebaka sa litšepe sa W-beam se lokela ho khaoloa ka halofo ho matlafatsa ts'ireletso ea sebaka sena khahlano le likhohlano tse ka bang teng.
- Tataiso ea Ts'ireletso ea ka Hare ho Lithapo: Mehele e khantšang, mabone a khanyang a letsatsi a LED, joalo-joalo, a ka kenngoa ka har'a lithanele ho hlalosa ka ho hlaka kemiso ea kotopo, ho eketsa khanya, ho ntlafatsa tataiso ea ho khanna, 'me ka nako e le 'ngoe ho fokotsa tšebeliso ea matla a mabone, ho finyella melemo e' meli ea tšireletso le tšireletso ea tikoloho.5 Tloaelo ea ho kopanya mekhoa e tsoetseng pele ea mabone le tataiso (e kang lipontšo tsa letsatsi, mehele e bonahatsang) ka har'a lithanele ha e ntlafatse tšireletso feela empa e boetse e nahanela matla a matla le melemo ea tikoloho. Sena se bonts'a mokhoa o akaretsang oa boenjiniere o reretsoeng ho ntlafatsa lipheo tse ngata ka nako e le 'ngoe, ho tsamaisa meaho ho isa nts'etsopele ea "bohlale".
5. Maemo a Khethehileng a Kopo bakeng sa Balebeli ba Mebileng ea Litoropo
Tšebeliso ea litsela tsa ho lebela litsela tsa litoropong e fapane le litsela tse kholo, e shebane haholo le ho itšehla thajana ho sireletsehileng ha batho ba tsamaeang ka maoto le likoloi tse sa tsamaeang, ho boloka taolo ea sephethephethe, le ho hokahanya le botle ba litoropo.
5.1 Tšebeliso ea Likoloi tsa Batsamai
Libaka tsa ho lebela ba tsamaeang ka maoto ke lisebelisoa tsa bohlokoa bakeng sa ho netefatsa polokeho ea batsamai litseleng tsa litoropo, tse etselitsoeng ho tataisa boitšoaro ba batho ba tsamaeang ka maoto le ho thibela ho oela ka phoso.
- Ho Thibela Batsamai ho Tsamaeang Litsela tsa Likoloi: Litšitiso tsa ba tsamaeang ka maoto li lokela ho kengoa mathōkong a litsela moo batsamai ba hlokang ho thibeloa ho tšela litselana tsa makoloi, haholo-holo mateanong a litsela, empa li lokela ho sitisoa mapaanong a ba tsamaeang ka maoto ho nolofatsa motsamao oa ba tsamaeang ka maoto.
- Ho Thibela Batsamai ka maoto ho Oela Libakeng Tse Kotsi: Ho lokela ho kengoa litšiea tsa batho ba tsamaeang ka maoto ha ho e-na le phapang ea bophahamo pakeng tsa tsela e ka thōko ho tsela le mobu o haufi (o fetang limithara tse 0.5) kapa kotsi ea ho oela ha batho ba tsamaeang ka maoto, hammoho le lehlakoreng le ka ntle la litselana tsa borokho.
- Litlhoko tsa bophahamo: Bophahamo bo hlakileng ba litšiea tsa ba tsamaeang ka maoto ka kakaretso ha boa lokela ho ba tlase ho limithara tse 1.10, 'me e se be ka tlase ho limithara tse 0.90. Ha lehlakore le bulehileng la borokho e le tsela e tsoakaneng ea batsamai ka maoto/e sa nkeng makoloi kapa tselana ea likoloi tse sa tsamaellaneng, bophahamo bo hlakileng ba seporo sa balebeli ba maoto bo lokela ho ba boholo ho feta limithara tse 1.40 ho thibela bapalami ho oela holim'a seporo.
- Litlhoko tsa Sebopeho: Libakeng tse nang le likotsi tsa ho oa, sebaka se hlakileng pakeng tsa litho tse otlolohileng tsa litšepe ha lia lokela ho feta 0.11 metres, 'me meaho e nang le libaka tse hatakelang ha ea lokela ho sebelisoa. Mehato ea ho thibela lipitsa tsa lipalesa ho oela le tsona li tlameha ho ba teng ho qoba likotsi tsa bobeli. Taolo ena e qaqileng mabapi le bophahamo ba terene ea ba tsamaeang ka maoto le sebaka se otlolohileng sa bar, hammoho le tlhoko ea ho qoba meaho e ka hloahloang, e bonts'a tlhokomelo e hlakileng bakeng sa polokeho ea ba tsamaeang ka maoto. Sena se bontša hore baqapi ha ba tsepamise maikutlo feela tabeng ea ho thibela ho oa empa hape ba kenella ho thibela ho hloa, ho tšoasoa, le likotsi tse ling tsa bobeli, haholo-holo bakeng sa lihlopha tse tlokotsing tse kang bana, tse bontšang kutloisiso e tebileng ea mekhoa ea boitšoaro ba batho ba tsamaeang ka maoto libakeng tsa litoropo tsa sechaba le mohopolo oa thibelo ea moralo.
- Libaka tsa Phallo e Phahameng ea Batsamaisi: Ho lokela ho kengoa litselana tsa ba tsamaeang ka maoto libakeng tse nang le batho ba bangata ba tsamaeang ka maoto, joalo ka liteishene, boema-kepe, tsela e fetang ea ba tsamaeang ka maoto le menyako le libaka tsa ho tsoa, le litsi tsa khoebo, ho tataisa phallo ea batsamai ka maoto le ho netefatsa polokeho.
5.2 Tšebeliso ea Litšireletso tsa Tsela ea Likoloi tse sa Tsamaisetsoang
Likoloi tse sa sebeliseng likoloi li sebelisoa haholo-holo ho arola likoloi tse tsamaeang ho tloha ho tse sa tsamaeeng, le likoloi tse sa tsamaeeng ho ba tsamaeang ka maoto, ho netefatsa polokeho ea libaesekele.
- Ho Arola Likoloi tse Tsamaeang ho Likoloi Tse sa Tsamaeng: Li-Guardrails li sebelisetsoa ho arola bapalami ba libaesekele ho likoloi tse tsamaeang, ho thibela likoloi tse tsamaeang ho kena tseleng ea likoloi tse sa tsamaeeng le ho ntlafatsa polokeho ea libaesekele.
- Ho Arola Likoloi Tse Seng Tsa Likoloi ho Batsamai: Moo ho se nang tsela ea ho paka haufi le tsela ea libaesekele le lebelo la likoloi tse haufi le tsona li le tlase, ho ka kengoa litselana tsa ho lebela ho arola bapalami ba libaesekele ho ba tsamaeang ka maoto, ha ho ntse ho thibela ba tsamaeang ka maoto ho kena tseleng ea libaesekele, ho qoba likhohlano tse bakoang ke sephethephethe se kopaneng.
- Tšireletso Likarolong tse Khethehileng tsa Tsela: Libakeng tseo ho tsona litšiea tse thibelang ho thulana, mateanong a litsela, kapa menyakong/matsoang li amang sebaka sa ho bona ha mokhanni, litšiea tsa tšepe, litšiea tse kopantsoeng, kapa litšiea tsa W-beam tse pepeneneng hantle, li khothaletsoa ho leka-lekanya polokeho le mehala ea pono.
- Moralo Melao-motheo: Ho khothaletsoa ho arola sephethephethe sa libaesekele le ba tsamaeang ka maoto ka matšoao kapa litselana tse inehetseng, ka bophara bo tlase ba limithara tse 3 bakeng sa litselana tse peli tsa libaesekele le limithara tse 1.5 bakeng sa litselana tsa ba tsamaeang ka maoto.
- Haufi le boemelo ba libese, litselana tsa libaesekele li ka ba bolelele bo lekanang le litselana tsa maoto kapa literata, empa li lokela ho phahamisetsoa bophahamong ba litselana ho sebelisa lithapo tse haufi le liemelo ho etsa hore ho be bonolo hore ba tsamaeang ka maoto ba fihle libakeng tseo ho emisoang libese ho tsona.
- mateano a litsela a lokela ho etsoa ka hloko ho fokotsa lebelo la likoloi, ho laola sephethephethe se kenang mateanong a litsela, le ho beha matšoao a loketseng ho fokotsa likhohlano tse ka bang teng.
5.3 Likopo tsa Guardrail Tsamaisong ea Nako ea Sephethephethe
Litšiea tsa nakoana li phetha karolo ea bohlokoa libakeng tsa kaho, liketsahalong tse khōlō, le tsamaisong ea maemo a tšohanyetso, tse sebelisetsoang ho tataisa sephethephethe, ho arola libaka le ho sireletsa tšireletso.
- Libaka tsa Mosebetsi oa Kaho ea Litsela:
- Lisebelisoa tsa ho itšehla thajana: Lits'oants'o tsa sephethe-phethe, litselana tsa ho lebela, le lits'ebeletso tse ling tsa ho itšehla thajana li lokela ho kenngoa likarolong tsa mosebetsi oa kaho ea litsela tsa litoropong ho arola likoloi tse tsamaeang ka enjene, likoloi tse sa tsamaeeng, le sephethephethe sa ba tsamaeang ka maoto, ho netefatsa polokeho ea kaho le taolo ea sephethephethe.
- Letshwao la Moedi le Temoso: Litšitiso tsa nakoana li ka sebelisoa ho tšoaea meeli, haholo-holo mererong ea nako e telele, ho nkela litselana tsa ho lebela ba tsamaeang ka maoto le likhoune tsa sephethephethe ho arola litselana tsa makoloi le litselana tse haufi kapa libaka tsa kaho ea litsela. Litšiea tsa nakoana li lokela ho tšoauoa ka ho hlaka, ka likhoele tse khubelu le tse tšoeu kapa tse ling tse hanyetsanang haholo tse shebaneng le sephethephethe se tlang, le mabone a lemosang a kenngoeng bosiu ho netefatsa ponahalo bosiu le motšehare. Lithibelo tse tletseng metsi li atisa ho sebelisoa boemong bona ka lebaka la botsitso le boiketlo ba bona ba ho tsamaea.
- Tloso ea Nako le Tsosoloso: Mehaho ea ts'ireletso ea ts'ireletso ea kaho ha ea tlameha ho tlosoa ntle ho mabaka, ho sebelisoa hampe, kapa ho lahloa; haeba ho tlosoa ha nakoana ho hlokahala ka lebaka la mekhoa ea kaho, lisebelisoa tsa tšireletso tsa nakoana li lokela ho eketsoa, 'me hang-hang li tsosolosoe ka mor'a hore mokhoa ona o phethoe.
- Liketsahalo tse Kholo tsa Sechaba:
- Tataiso le Taolo ea Bongata: Liketsahalong tse kholo tsa sechaba, bahlophisi ba lokela ho theha ka mahlale litsela tsa ho kena le ho tsoa ho bapalami ba ipapisitse le litšobotsi tsa sebaka seo ho tšoareloang likopano ho sona, ho sebelisa litsela tsa potoloho e le 'ngoe kapa tse sa khutleng ho tataisa phallo ea bapalami, ho khelosa ka mokhoa o utloahalang, ho qoba ho phalla ha likhohlano, le ho thibela ho tlatlapana.25 Haeba ho hlokahala, bahlophisi ba lokela ho hira litšiea, libaka tse koaletsoeng, le libaka tse ling tsa tšireletso ho koala sebaka kapa basebetsi ba laolang.
- Tšireletso ea Tšireletso le Karabo ea Tšohanyetso: Bahlophisi ba ketsahalo ba tlameha ho theha libaka tsa tšireletso setšeng ho fokotsa khatello ea bongata kapa ho tlosa basebetsi maemong a tšohanyetso. Ha sets'oants'o sa bongata se le holimo haholo kapa se ka lebisa ho stampedes, mochine o senyang potoloho o lokela ho kengoa hang-hang, ketsahalo e felisoe, 'me khoele e ka ntle e kenngoe, e lumelle ho tsoa feela.
- Phapamiso ea Sephethephethe le Mokhatlo: Nakong ea katoloso ea litsela tse kholo, merero ea ho aha bocha le ea tokiso, phaposo ea sephethephethe le mosebetsi oa tlhophiso o tlameha ho etsoa ka nepo nakong ea tokiso ea literene ho netefatsa ts'ebetso e bolokehileng ea sephethephethe. Bakeng sa liketsahalo tse kholo, haeba li ka ama sephethephethe le taolo ea sechaba, bahlophisi ba lokela ho etsa tataiso ea sephethephethe le meralo ea tlhokomelo.
6. Qetello
Highway guardrails, e le karolo ea bohlokoa ea ts'ireletso ea sephethephethe tseleng, e na le maemo a fapaneng a ts'ebeliso le mesebetsi e fapaneng, e fetang hole ho itšehla thajana. Tlaleho ena, ka tlhahlobo e tebileng ea likopo tsa balebeli mabatooeng a litsela, bohareng ba bohare, marokho, lithanele, hammoho le litsela tsa litoropo le taolong ea nakoana ea sephethephethe, e senola karolo ea bona ea mantlha ho netefatsa polokeho ea litsela, ho tataisa phallo ea sephethephethe, le ho fokotsa tahlehelo ea likotsi.
Moralo le khetho ea lithaelese tsa balebeli ke mekhoa e rarahaneng ea ho etsa liqeto tsa boenjiniere e hlokang ho nahanoa ka botlalo mabapi le litšobotsi tsa tsela, bophahamo ba sephethephethe, sebopeho sa koloi, maemo a tikoloho le litlamorao tse ka bang teng tsa likotsi. Ka mohlala, likarolong tse nang le kotsi e kholo joalo ka li-curve tse nchocho, matsoapo a moepa, le mekoloko e phahameng, boemo ba tšireletso ea litšepe tsa tšireletso bo tlameha ho phahamisoa ka nepo, ho bonts'a filosofi e matla ea moralo e thehiloeng tlhahlobong ea kotsi. Ho khethoa ha litsela tsa borokho ha hoa lokela ho kopana le ts'ebetso e thibelang ho thulana feela empa hape ho nahanoa ka boima ba sebopeho le litlhoko tsa botle, haholo-holo ha u tšela liporo, matamo le libaka tse ling tse hlokolosi, moo boemo ba ts'ireletso ea bona bo lokelang ho eketsoa haholo ho sebetsana le litlamorao tse ka bang kotsi tsa tsamaiso. Moralo oa Guardrail menyakong ea lithanele/matsoang o hatisa phetoho le tataiso ea pono ho ikamahanya le litlhoko tsa maikutlo tsa bakhanni nakong ea liphetoho tsa khanya le tikoloho.
Ho feta moo, boqapi bo tsoelang pele ho theknoloji ea guardrail, joalo ka ts'ebeliso ea lithaelese tse kopantsoeng tsa ts'ireletso le meqomo e potolohang e thibelang ho thulana, e bonts'a matsapa a ntseng a tsoela pele a boenjiniere ba sephethephethe ho ntlafatsa ts'ebetso ea polokeho, ho ntlafatsa ts'ebetso ea ts'ireletso, le ho netefatsa ts'ebetso ea tikoloho. Litloaelo tsena tsa nts'etsopele li bonts'a hore litsamaiso tsa kamoso tsa balebeli li tla ba bohlale haholoanyane, li kopane, 'me li khone ho ikamahanya le maemo a thata le a fetohang a sephethephethe. Libaka tse sireletsang batho ba tsamaeang ka maoto le litselana tsa makoloi tse sa sebetseng litseleng tsa litoropo li bonts'a tšireletso e hlakileng bakeng sa basebelisi ba litsela ba tlokotsing (batsamai ka maoto, ba libaesekele), ba aha libaka tse sireletsehileng le tse hlophisehileng tsa sephethephethe sa litoropo ka ho itšehla thajana le tataiso ea boitšoaro.
Ka bokhuts'oane, maemo a ts'ebeliso ea lits'oants'o tsa litsela tse kholo a na le mahlakore a mangata le a tsamaiso. Moralo oa bona le ts'ebetsong ha se liphephetso tsa tekheniki feela empa hape ke mohlala o tebileng oa filosofi ea sephethephethe "e sekametseng bathong, polokeho pele". Ka kholo e tsoelang pele ea tlhokeho ea sephethephethe le tsoelopele ea mahlale, karolo ea litebello ho netefatsa polokeho ea mebileng e tla tsoela pele ho fetoha, ho leba litseleng tse sebetsang hantle, tse bohlale, le tse shebaneng le batho.
