If you plan to be trucking in Pennsylvania this weekend, here’s a heads-up.

An 8-mile stretch of the Pennsylvania Turnpike is scheduled to be closed in both directions just east of Pittsburgh from midnight Saturday until 4:15 a.m. Sunday morning.

Eastbound traffic will be detoured at Exit 67. Westbound will detour at Exit 75.

The four-hour closure is to allow workmen to demolish an overhead bridge that’s being replaced.