through traffic; straight-travelling vehicle
Used in traffic contexts for vehicles that continue straight through an intersection without turning, or for through traffic as opposed to turning traffic.
At this intersection, through traffic has the right of way.
Accidents between straight-travelling vehicles and right-turning vehicles are frequent.
左折車 is a left-turning vehicle, contrasting with 直進車.
Compound of 直進 (straight advance) and 車 (vehicle).