"Heavy congestion" means that there is a lot of traffic or a large number of people in one area, causing a lot of crowding and difficulty in moving around smoothly. Full definition
I personally think it is a good opportunity to rest a few with such heavy congestion coming up. (justarsenal.com)
Lane Following Assist tracks vehicles in front of the Ceed in traffic, and identifies appropriate spaces in other lanes to move in to safely to gain more ground in heavy congestion. (greencarcongress.com)
With heavy congestion on the city's roadways, every driver needs reliable Woodbridge car insurance. (trustedchoice.com)