Description of new device installed on Chicago Express Drive, consisting of curbs or fins that can be raised or lowered hydraulically so as to readjust traffic lanes to accommodate varying volumes of traffic.
Traffic lane markers are adjusted hydraulically to speed traffic
Roads Bridges
Roads and Bridges ; 79 , n 8
1941
2 pages
Article (Journal)
English
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Hydraulically operated dividers adjust lanes to traffic flow
Engineering Index Backfile | 1940
|European Patent Office | 2015
|Hydraulically operated dividers adjust lanes to traffic flow
Engineering Index Backfile | 1940
|