road traffic
Refers to vehicular and pedestrian movement on roads; used in legal, administrative, and everyday contexts.
Let's obey the Road Traffic Act.
Road traffic is heavy in this area.
交通 is a broader term for traffic or transportation in general, while 道路交通 specifically refers to traffic on roads.
intelligent transportation system; ITS
Compound of 道路 (road) and 交通 (traffic).