Cov paib txwv kev ceev yog ib hom kev tsheb ciav hlau siv los qhia qhov siab tshaj plaws lossis tsawg kawg nkaus ceev txwv rau cov tsheb taug kev ntawm ib ntu ntawm txoj kev. Lawv lub ntsiab lus tseem ceeb yog siv cov lej tseeb thiab cov cim kos duab los tswj lossis qhia tias cov neeg tsav tsheb ua raws li cov kev xav tau ceev ceev kom muaj kev nyab xeeb ntawm kev khiav tsheb thiab khiav zoo. Cov paib ceev txwv feem ntau tau muab faib ua hom hauv qab no:
Daim Ntawv Ceeb Toom Tshaj Lij Tshaj Tshaj Tshaj Tshaj Tshaj: Cov voj voog uas muaj ciam teb liab, dawb keeb kwm yav dhau, thiab ntawv dub, qhia txog qhov siab tshaj plaws uas tso cai rau txoj kev ntawd (piv txwv li, 60 km / h).
Daim Ntawv Ceeb Toom Ceev Tsawg Tsawg: Lub voj voog nrog cov keeb kwm xiav xiav thiab cov ntawv dawb, qhia qhov tsawg kawg nkaus ceev rau cov tsheb (xws li, 40 km / h), feem ntau pom ntawm txoj kev loj.
Daim Ntawv Qhia Ceev Txwv: Square nrog cov keeb kwm xiav xiav thiab cov ntawv dawb, qhia txog kev pom zoo ceev rau cov neeg tsav tsheb nyob rau hauv cov xwm txheej tshwj xeeb (xws li, nkhaus, thaj chaw tsev kawm).
Cov Qauv Txuj Ci: Raws li GB 5768-2009 Txoj Kev Tsheb Ciav Hlau thiab Cov Ntawv Cim, qhov loj, xim, thiab kev cuam tshuam ntawm cov cim txwv ceev yuav tsum ua raws li cov qauv hauv tebchaws. Piv txwv li, txoj kab uas hla ntawm txoj kev hauv nroog feem ntau yog 60-80 cm, thiab cov yeeb yaj kiab qhia txog qib yuav tsum mus txog Qib III lossis siab dua.
