HOUSTON - If you're heading downtown this weekend, get ready for a traffic nightmare.

Portions of I-45 between I-10 and the 59-Freeway will be shut down from 9p.m. Friday through 5 a.m. Monday. The only way around downtown will be using 59 on the east side.

The closure will also take place November 18-21, December 2-5, and December 9-15.

The reason? Crews are working on the West Dallas bridge. It was damaged when it was struck by a piece of construction equipment in September. Crews plan to demolish and re-build the bridge to increase the clearance height.