By system of circular movement first used at Columbus Circle, New York City, in 1903, Trafalgar Square intersections were reduced from 40 to 7; illustrations from second annual report of London and Home Traffic Advisory Committee for year 1926-27 in Bulletin of Permanent International Association of Road Congresses.
Roundabout system of traffic at certain London squares
Eng. News Rec
Engineering News Record ; 102 , n 3
1929
3 Figs.
Article (Journal)
English
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