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US 5,699,986 AGranted
Railway crossing collision avoidance system
AssigneeAlternative Safety Technologies
InventorJames E. Welk
Life of this patent
Estimating the term…
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AssigneeAlternative Safety Technologies
InventorJames E. Welk
Estimating the term…
With the vehicle anti-collision system of the present invention, road vehicles in the vicinity of a railway crossing are alerted as a train approaches the crossing. A signalling device operating in conjunction with a GPS receiver located in the train emits a signal to a receiver located at the railway crossing to provide an indication of the rail vehicle's location with respect to the railway crossing. The signal is sent continuously at predetermined intervals to provide the railway crossing with sufficient data to estimate the velocity and time of arrival of the train or railway vehicle at the crossing. The railway crossing processes the information and transmits an alarm signal to approaching road vehicles as the rail vehicle approaches the crossing. The signal emitted by the crossing is received at the road vehicle which provides various levels of alarms depending on how close the rail vehicle is to the crossing.
A railroad crossing collision avoidance system for alerting a road vehicle approaching a railroad crossing of an oncoming rail vehicle, comprising:
A railroad crossing collision avoidance system for alerting a road vehicle approaching a railroad crossing of an oncoming rail vehicle, comprising:
Dependencies are inferred from the claim text.