Jam-up and Keep lid on

Jam-up noun - A crowded mass (as of cars) that impedes or blocks movement.

Keep lid on and jam-up are semantically related. In some cases you can use "Keep lid on" instead a verb phrase "Jam-up".

Jam-up and keep lid on are semantically related. Sometimes you can replace phrase "Jam-up" with "Keep lid on", this terms are similar.