The patent application concerns a railroad-highway grade crossing warning system employing a pair of incandescent lamps mounted so as to be visible to a motorist approaching a crossing and a control circuit for alternately energizing each of the lamps at a rate of between 30 and 60 times per minute. Mounted in juxtaposition on the incandescent lamps is a pair of xenon lamps also visible to the approaching motorist. The xenon lamps are alternately triggered by a synchronized control circuit at a rate of two to four times that used for the incandescent lamps. The xenon lamps provide signals of greater altering effectiveness than do the conventional incandescent lamps and therefore are more readily visible to the approaching motorist. The system includes an additional trouble lamp that is energized to indicate the absence of an approaching train.
A Grade-Crossing Motorist Warning System
1975
15 pages
Report
Keine Angabe
Englisch
Transportation Safety , Transportation & Traffic Planning , Government Inventions for Licensing , Patent applications , Traffic signals , Warning systems , Intersections , Railroads , Highways , Vehicular traffic control , Incandescent lamps , Xenon lamps , Synchronism , Effectiveness , Visibility , Traffic safety , PAT-CL-244-240 , DOT/5O , DOT/4HZ/HY
Motorist Understanding of Selected Warning Signs
Online Contents | 1996
|Highway Grade Crossing Warning System
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