Improvement of the effectiveness of motorist warnings at railroad highway grade crossings. Final report.
|Main Author:||Hopkins, John B.|
|Related Names:||White, E.|
Railroad grade crossings.
Flashing traffic signals.
Warning Signs/ Warning Signals.
96 p. :
31 ref. figs. graphs. photos. tables.
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|Item Link||Original Source|
|Full view||University of Michigan|