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Method and apparatus for monitoring highway traffic

  • US 5,457,449 A
  • Filed: 02/14/1994
  • Issued: 10/10/1995
  • Est. Priority Date: 02/14/1994
  • Status: Expired due to Fees
First Claim
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1. A portable device for identifying hazardous traffic conditions at highway construction sites, comprising:

  • an elongated pressure sensitive monitor for lying down onto a road surface;

    a monitor switch coupled to the monitor, the switch actuating when a predetermined amount of pressure is applied onto the monitor;

    a siren operably coupled to the monitor switch, the siren generating a high decibel alarm when energized; and

    a portable controller coupled between the siren and the monitor switch for selectively energizing the siren for a given amount of time after the monitor switch is actuated, the controller further including means for both selectively varying the amount of time that the siren remains energized after the monitor switch is actuated and extending energization of the siren by the selected amount of time when the monitor switch is reactuated during siren energization.

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