A Traffic Jam, Especially on a Motorway

This page is the CodyCross answer for the clue below from Water Park, Group 756, Puzzle 3 (Conveyor Belt).

Question is: A Traffic Jam, Especially on a Motorway

and the answer is: TAILBACK

Word Meaning:

TAILBACK — (UK, Ireland, Commonwealth) A line of motor vehicles causing or the result of traffic congestion or a traffic jam.

Definitions from Wiktionary.