Combination of manual and electric interlocking installed at East Springfield, Ill; signals normally clear for Wabash trains; manually operated derails and electric switch locks on opposing switching route.
Semi-automatic interlocking at crossing on Alton
Ry Signaling
Railway Signaling ; 28 , n 7
1935
Article (Journal)
English
© Metadata Copyright Elsevier B. V. All rights reserved.
Interlocking and automatic signals on Alton
Engineering Index Backfile | 1941
Automatic plant replaces mechanical interlocking on Alton and Southern
Engineering Index Backfile | 1934
Automatic plant replaces mechanical interlocking on Alton and Southern
Engineering Index Backfile | 1934
Alton railroad demonstrates feasibility of automatic interlocking at complex grade crossings
Engineering Index Backfile | 1932
Automatic interlocking replaces crossing gates
Engineering Index Backfile | 1937