Traffic, traffic accidents And Related Idioms (3)

Slow-moving traffic and too many cars on the road cause these traffic situations, expressed as nouns:

A traffic jam

A traffic snarl

Bumper-to-bumper traffic

The expressions to tie up traffic and to hold up traffic mean to cause traffic to be slow or stopped, as shown in these examples:

------ Road construction has (tied up / held up / snarled) traffic all week.

------ Traffic was held up because of an accident.