Peculiar street-traffic and highway railroad-crossing protection problem solved by use of automatically controlled "stop" and "go" signals effective for control of train movements, as well as vehicular traffic; design and operating features.
Unique highway crossing protection in Seattle
Ry. Signaling
Railway Signaling ; 24 , n 4
1931
3 Figs.
Aufsatz (Zeitschrift)
Englisch
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Engineering Index Backfile | 1915
Engineering Index Backfile | 1930
Engineering Index Backfile | 1928
Engineering Index Backfile | 1925
|Engineering Index Backfile | 1930