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A platform for research: civil engineering, architecture and urbanism
How great northern reduces accidents at highway crossings
Over four year period short arm gates with flashing light signals were installed at 27 crossings, flashing light signals with rotating stop disks were installed at 56 crossings and flashing light signals only, at five crossings. (see also Ry Age v 138 n 19 May 1955 p 28)
How great northern reduces accidents at highway crossings
Over four year period short arm gates with flashing light signals were installed at 27 crossings, flashing light signals with rotating stop disks were installed at 56 crossings and flashing light signals only, at five crossings. (see also Ry Age v 138 n 19 May 1955 p 28)
How great northern reduces accidents at highway crossings
Ry Signaling Communications
1955
2 pages
Article (Journal)
English
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