Number of unique and interesting highway geometrics in metropolitan St. Louis area; reversible lanes on Route I-70 with use of movable guard rail, mounted on small gage railroad car to open and close reversible lanes; use of "trap rock" skin-resistant pavement overlay at high-accident locations; material is rhyolite phorphory with Los Angeles abrasion factor of 18% and specific gravity of 2.858; merging solution of heavily occupied lanes.
Traffic engineering features of Missouri state highways in metropolitan St.Louis
Traffic Eng
Traffic Engineering ; 37 , n 12
1967
3 pages
Article (Journal)
English
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