Method, computer software code, and system for determining a train direction at a railroad crossing
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United States of America Patent
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Nov 17, 2009
Grant Date -
Mar 20, 2008
app pub date -
Sep 20, 2006
filing date -
Sep 20, 2006
priority date (Note) -
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Abstract
In a railroad crossing warning system having an electronic transmitter located on a first side of a road crossing connected across both railway rails, a first electronic receiver on the first side of the road crossing connected across both railway rails, a second electronic receiver on the second side of the road crossing connected across both railway rails, a method for determining direction a vehicle is traveling, the method including monitoring a voltage profile from at least one of the first receiver and the second receiver, as a vehicle moves along the railway rails towards the road crossing, and determining a direction the vehicle is moving based on the voltage profile.
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