Three indication advance warning traffic lights and switching cut out are features of auto stop installation on Boston Post Road at Wayland, Mass; one auto stop unit, composed of two 10 ft barrier sections and motor drive section, was installed on each side of tracks, one at point 86 ft from nearest rail on approach side of road, and other, on other side of tracks, 116 ft from nearest rail on approach side of road.
Highway traffic retarding-barriers on Boston and Maine
Ry Signaling
Railway Signaling ; 30 , n 1, Part 1
1937
5 pages
Article (Journal)
English
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Engineering Index Backfile | 1938
Engineering Index Backfile | 1938
Centralized traffic control on Boston and Maine
Engineering Index Backfile | 1931
|Centralized traffic control on Boston and Maine
Engineering Index Backfile | 1932
Centralized traffic control on Boston and Maine
Engineering Index Backfile | 1932