Gridlock describes extreme traffic congestion where movement stops completely, not just slow traffic. Due to the parade, the downtown area was in complete gridlock.
Pro Tip 2/3
Large Scale
Gridlock usually refers to widespread traffic issues affecting an area, not just one street. The entire city faced gridlock after the snowstorm.
Pro Tip 3/3
Unexpected Delay
Gridlock often implies an unforeseen disruption in traffic flow, leading to frustration. I was late to the meeting because I got caught in gridlock.