ALLEGHENY COUNTY — The Pennsylvania Turnpike advises motorists of possible delays tonight in the westbound lanes between the Allegheny Valley, Exit 48, and the Butler Valley, Exit 39, interchanges.

Delays may occur due to four intermittent, 20-minute traffic paces scheduled between 10 p.m. and 6 a.m.

During those times, Turnpike maintenance and state police will restrict traffic to 20 to 25 mph while crews complete pavement marking application.

Motorists should be prepared for slow-moving traffic and possible stoppages.

Work schedules are subject to change based on weather.