The phrase "congested traffic" means there are too many vehicles on the road, causing a lot of cars to be stuck in one place and unable to move quickly. Full definition
This also includes active cruise control, high - beam assist, road - sign recognition and traffic - jam assistance, which can semi-autonomously drive in congested traffic at up to 37mph. (carbuyer.co.uk)
Not only could you argue that squinting at the Vita's smaller screen wouldn't be ideal for dodging heavy traffic at high speed, but it helps alleviate the frustration of having to concentrate on avoiding collisions with congested traffic in a heated race, which sometimes marred the console game. (teamvvv.com)
The fact that you can take a fast ferry from Lombok means that you can avoid long drives through congested traffic from Denpasar. (villasapi.com)