Equipment and methods used in first stages of construction of 161-mi all weather low gradient express highway to be operated as toll road between Harrisburg and Pittsburgh; roadway section of 78-ft oa width carries two 24-ft roadways separated by 10-ft plated strip.
Road builders start grading of Pennsylvania's $60,000,000 trans-mountain Toll Highway
Construction Methods Equipment
Construction Methods and Equipment ; 21 , n 2
1939
Article (Journal)
English
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