E Whiteland Twp police have been very active with a speed trap on Rt 29 between Great Valley Pkwy and Valley Stream Pkwy. They are focusing on the southbound lane. Likely part of the PA Aggressive driver enforcement program.
LEO sits in the twp park on the northbound lane, near GV Pkwy, and observe vehicles crossing through a zone on the southbound lanes (demarcated with white lines, vicinity of the crossover for the park).
Another LEO (or multiples) sit at the bottom of the hill, near the Courtyard by Marriot hotel, waving drivers to the shoulder.
Speed limit on this road is 45mph.