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Why Unidirectional In-pavement Lighting
Greetings!
During the early 1990's, over a period of 8 years, extensive experimentation and studies on LightGuard Smart Crosswalk design occurred. As a
result the core concepts for In-Roadway Warning Light (IRWL) crosswalk systems were developed. A participating group of traffic industry professionals determined that IRWL enhanced crosswalk design should "alert the motorist to the presence of a pedestrian in the crosswalk".
In the article below our CEO describes in detail how and why this important concept was developed. He explains how at the last minute during approval of IRWL
systems into the Federal MUTCD the recommendation and studies supporting unidirectional in-pavement lighting for IRWL enhanced crosswalks was circumvented.
To see the technical paper click HERE ...
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The Early Years - "Authorization to Experiment" By Mike Harrison, CEO LightGuard Systems, Inc.
The concept of "In-Pavement Warning Lights" (IRWL's) at crosswalks was approved by the California Traffic Control Devices Committee (CTCDC) for experimental evaluation.
As part of this evaluation, the City of Santa Rosa, California, agreed in 1993 to have IRWL systems installed at three locations chosen by them. These systems were designed by my newly minted company, "LightGuard Systems, Inc." I chose a name that would fit the concept of a lighted crossing guard.
The application for a permit from the FHWA mandated "before and after" studies to determine whether the proposed system 1) would work as anticipated and 2) would not create any unforeseen problems for motorists or pedestrians.
As a Corporate Pilot and Flight Instructor (and in earlier years an aircraft mechanic in the U.S. Navy), I was well aware of "runway" lights. I was also aware of the fact that they were costly to purchase, install and maintain. They were not a proper consideration for the highways or internal roads. We set out to develop a product that was similar to reflective raised pavement markers in use on the roadways; however we wanted to internally illuminate them. We knew the product needed to be easy to install and yet rugged. How we would get this done was the issue. The main focal point of initial field testing was mostly seeking the "human factors" aspect... Would motorist "yield" to the lights without causing other problems? Working with Whitlock and Weinberger and Associates, (The firm contracted by the City to perform the evaluations and reports), we set out to comply with State Mandated guidelines...
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 Click on image to see LightGuard System Patent |
LightGuard Systems Story
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SAMPLE OF COMPLETED PROJECTS 2010
- Skyline College - San Bruno, California
- City of Atwater, California
- Universal Studios, Anaheim California
- El Segundo AFB, Los Angeles, California
- Safeway Facility, City of Commerce, California
- Bernanillo, New Mexico
- Panama City, Florida
- Cleveland Rapid Transit Authority, Cleveland Ohio
- Knoxville, Tennessee
- Oak Ridge National Laboratory, Oak Ridge, Tennessee
- Roundabout IRWL System - Collyville, Texas
- Roundabout IRWL System - Payson, Arizona
- Jericho Corners, Vermont
- Medford, Massachusetts
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