ALLEGHENY COUNTY — The Pennsylvania Turnpike Commission says motorists traveling between the Butler Valley, Exit 39, and Allegheny Valley, Exit 48, interchanges may have delays due to four intermittent, 20-minute traffic paces overnight beginning at 8 p.m. today and ending by 6 a.m. Thursday.

The delays will be both eastbound and westbound.

Motorists entering the turnpike at the Allegheny Valley heading west will be stopped at the interchange until the westbound paces are completed.

Turnpike maintenance and state police vehicles will restrict traffic speed to 20-25 mph, allowing crews to complete line painting.