Highway work zone intrusion alarm system
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United States of America Patent
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-
Aug 26, 1997
Grant Date -
N/A
app pub date -
Nov 7, 1995
filing date -
Nov 7, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A work zone intrusion alarm system which sounds a siren to warn highway workers in the event a vehicle enters a work zone. Workers may thus react to errant vehicles in time to avoid injury. The work zone intrusion alarm system is composed of a series of pneumatic sensing lines arranged within a highway work zone adjacent a perimeter separating the work zone from oncoming traffic. The sensing lines are connected at junction boxes which include pressure switches. A warning alarm including a siren is activated by the pressure switch upon the compression of a sensing line when driven over by an errant vehicle.
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