Accessible pedestrian signal system
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United States of America Patent
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-
Mar 4, 2014
Grant Date -
Dec 22, 2011
app pub date -
Jun 17, 2011
filing date -
Jun 22, 2010
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Methods and systems are provided for conflict monitoring and error detection in accessible pedestrian signal systems. A primary conflict monitor and error detector is configured to control output of audible and vibrotactile pedestrian signal indications. The primary conflict monitor and error detector monitors the current traffic state, and verifies audio and vibrotactile control signals against the current traffic state and user settings to determine whether to enable output of audible and vibrotactile pedestrian signal indications. The primary conflict monitor and error detector may transmit information about the audio and vibrotactile control signals to a secondary conflict monitor and error detector, which verifies the information received against the current traffic state and user settings, and inhibits output of audible and vibrotactile pedestrian signal indications in the event of a detected conflict or error.
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