A2
the cars, trucks, etc. using a road
Dictionary examples:
The traffic was so slow, snails passed us. (0.0)
The traffic moved so slowly, I finished a book. (0.0)
I'm late because the traffic decided to have a party. (0.0)
The traffic is heavy in both directions. (32.6)
Five people were injured in a traffic accident. (33.2)
We got stuck in traffic for several hours. (35.3)