Rau daim ntawv thov rau sab thiab tom qab ntawm cov tsheb loj, cov tsheb thauj khoom thiab lwm lub tsheb kom lawv pom kev, tshwj xeeb tshaj yog thaum lub tsheb tig los yog hla txoj kev.
Raws li Tshooj 8 ntawm Phau Ntawv Qhia Kev Nyab Xeeb Kev Nyab Xeeb (Kev Nyab Xeeb Kev Nyab Xeeb & Cov Ntawv Qhia rau Txoj Kev Ua Haujlwm & Lub Sijhawm Ib ntus), tag nrho cov tsheb uas txhob txwm nres ntawm txoj kev kub ceev yuav tsum raug cim siv cov cim pom zoo no. Cov paib ua raws cai no yog qhov cuam tshuam thiab tshem tau, txhais tau tias koj tuaj yeem tshem tawm tag nrho lossis sib pauv cov cim ntawm cov tsheb sib txawv, lossis tsuas yog tshem tawm yog tias koj siv koj tus kheej lub tsheb.
Cov khoom siv reflective yuav tsum nqa "E-kos" uas txhais tau hais tias daim kab xev ua tau raws li qhov tsawg kawg nkaus ntawm cov kev cai. Cov cim qhia txog yuav tsum yog 'Class RA2' lossis 'microprismatic' nyob rau hauv rooj plaub ntawm cov cim nram qab thiab 'siab pom kev fluorescent lossis tsis muaj fluorescent daj reflective' nyob rau hauv rooj plaub ntawm cov cim sab
Cov cim liab lossis daj yuav tsum tau siv rau sab nraub qaum ntawm lub tsheb, ze li qhov ua tau zoo rau ntawm ntug ntawm lub tsheb. Cov cim daj lossis xim dawb tuaj yeem siv rau sab ntawm lub tsheb, npog tsawg kawg 80 feem pua ntawm nws qhov ntev
