A tie-up or a traffic tie-up is a long line of vehicles that cannot move forward because there is too much traffic, or because the road is blocked by something.
例句
In some cities this morning, there were traffic tie-ups up to 40 miles long.今天早上，在有些城市汽车排起了长达 40 英里的长龙。
N-COUNT
经济关系;贸易往来
A tie-up between two organizations is a business connection that has been arranged between them.