Stretched intersection and signal warning system
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United States of America Patent
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Feb 21, 2017
Grant Date -
Jan 21, 2016
app pub date -
Jul 18, 2014
filing date -
Jul 18, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
One embodiment of a traffic intersection lane and signal system for improving intersection capacity and safety. Through traffic is stopped by signal means (22) a distance away from the intersection. Turning traffic on turn lanes (10) and (14) have an option to proceed and queue on lane segments (12) and (16) respectively, then complete the turning maneuvers during phase φ7 and phase φ1 respectively. The through traffic released from signal means (22) arrives at the intersection at the time opposing left turn phase φ5 expires and through phase φ6 starts, and passes through the intersection without significant delay. A set of detectors (50) and signal means (52) located before the presignal help drivers to make stop decisions, and another set of detectors (54) and signal means (56) located before the intersection provide last second warning to drivers who ran the red light at the presignal. This system accommodates left-handed or right-handed driving conventions.
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