The Pennsylvania Turnpike Commission cautions motorists that a 13-mile stretch of the Northeastern Extension (I-476) will be closed in both directions for six hours Aug. 25 between Lansdale (Exit 31) and Quakertown (Exit 44).

The closure is necessary for the protection of motorists and workers during placement of concrete girders on the bridge that carries Fretz Road over the turnpike at milepost A31.7 in Lower Salford Township, Montgomery County.At 12:01 a.m., Aug. 25, southbound traffic will be diverted to the Quakertown Interchange and northbound traffic to the Lansdale Interchange. Motorists wishing to travel north from the Mid-County Interchange or the east/west turnpike mainline will be directed to exit at Lansdale Interchange. One lane in each direction on the Northeastern Extension will reopen to traffic by 6 a.m.Prior to the shutdown, motorists should be prepared for the left lanes to be closed northbound and southbound at 8 p.m., Aug. 24, between milepost A31-A33. The speed limit will be posted at 40 MPH until the single-lane patterns are lifted. Construction-zone speed limits will be enforced and fines increased.Pennsylvania State Police and turnpike personnel will be positioned at the Lansdale and Quakertown interchanges to assist motorists. Motorists can tune to radio 1640 AM for detour information and traffic conditions or call the Turnpike Roadway Information line at (866) 976-8747. Changeable message signs will also provide updated information regarding closures and detours. Motorists are encouraged to plan accordingly. For emergencies, dial *11 on your mobile phone.DetoursTraveling southbound on I-476: Exit at Quakertown Interchange (Exit 44). Take State Route 663 north (John Fries Hwy.) to Route 309 south to State Route 63 west (Sumneytown Pike) to re-enter the turnpike at the Lansdale Interchange (Exit 31).Traveling northbound on I-476: Exit at Lansdale Interchange (Exit 31). Take State Route 63 east (Sumneytown Pike) to Route 309 north to State Route 663 west (John Fries Hwy.) to re-enter the turnpike at the Quakertown Interchange (Exit 44).For more information, visit the project website at

www.paturnpike.com/constructionprojects/mpA31toA38. In case of inclement weather, the closure will be rescheduled.Travelers can get turnpike traffic alerts by calling (866) 976-TRIP or visiting the live Travel Conditions Map online at

www.paturnpike.com/webmap. The turnpike's smartphone app, TRIP Talk, streams audio advisories to iPhone and Droid users so they can keep their hands on the wheel and eyes on the road. To download the free app, visit

www.paturnpike.com/triptalk.