A Faster, Cheaper, Better Way to Build a Wall: How a Simple Highway Widening Led to a Patent

by Michael Sydlik, P.E., (M.ASCE), President of Earth, Inc., of Pittsburgh, PA, a specialty geotechnical engineering company firm he started in 1983, msydlik@earthincorp.com,

Serial Information: Geo-Strata —Geo Institute of ASCE, 2019, Vol. 23, Issue 5, Pg. 54-59

Document Type: Feature article

Abstract: When first opened in 1940, and as segments were later added to it, the Pennsylvania Turnpike (Turnpike) was principally a four-lane highway with two eastbound and two westbound lanes. As traffic volume increased over time, the Pennsylvania Turnpike Commission (PTC) increased capacity and improved safety by widening the roadway to add lanes and widen medians and shoulders.

Subject Headings: Traffic safety | Walls | Highways and roads | Traffic capacity | Highway and road shoulders | Traffic management | Traffic volume | Pennsylvania | United States


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