(a) Txhua lub teeb liab uas siv los muab lub teeb liab ntawm kev xav tig sab xis lossis sab laug yuav tsum teeb tsa flashing dawb lossis lub teeb pom kev pom rau pem hauv ntej thiab flashing liab los yog lub teeb pom kev pom ntawm sab nraub qaum.
Lub tsheb tig teeb liab puas yog dawb?
Raws li cov cim tig, hauv California lawv raug tso cai dawb. Lawv yuav tsum yog dawb rau amber.
Koj lub teeb liab tig rov qab puas tuaj yeem dawb?
Tsheb kauj vab tsuas yog amber lossis liab raws txoj cai.
Yuav ua li cas xim tig teeb liab yuav tsum yog?
Txhua lub tsheb hauv Tebchaws Meskas muaj lub teeb liab tig, thaum koj feem ntau pom amber nyob rau lwm lub tebchaws. Teb Chaws Asmeskas tso cai rau amber tig teeb liab, tab sis tsis xav tau lawv.
Puas yog lub teeb qhia dawb raug cai?
Feem ntau, tag nrho cov teeb thiab retro reflectors qhia rau pem hauv ntej ntawm lub tsheb yuav tsum yog dawb thiab tag nrho cov uas qhia rau tom qab yuav tsum yog liab. Qhov tshwj xeeb yog cov taw qhia kev taw qhia thiab cov teeb pom kev sab, uas yuav tsum yog amber.
