noun
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.
この交差点では直進車が優先されます。
At this intersection, through traffic has the right of way.
直進車と右折車の事故が多発している。
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).