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Guidelines for freeway lighting curfews.

File Language:
English


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  • NTL Classification:
    NTL-HIGHWAY/ROAD TRANSPORTATION-HIGHWAY/ROAD TRANSPORTATION ; NTL-SAFETY AND SECURITY-Highway Safety
  • Abstract:
    Roadway lighting is provided on selected highways to improve the visibility of the nighttime environment. ; Roadway lighting is typically warranted on the basis of the daily traffic volume. However, in the earlymorning ; hours, the traffic volumes may be so low as to diminish the need for roadway lighting. At present, ; the lighting infrastructure in place on Texas Department of Transportation (TxDOT) highways is not well ; suited to being dimmed. As a result, turning off roadway lighting during early morning hours is the only ; option. This concept is known as a lighting curfew for purposes of this research project. The lighting curfew ; section of the TxDOT 2003 Illumination Manual does not provide specific guidelines or criteria for ; implementing lighting curfews. Although lighting curfews are of interest around the country, no state has ; developed guidelines for lighting curfews, nor are there national guidelines at this time. The most significant ; potential benefits of lighting curfews include reduced power consumption and reduced light pollution. ; This project focused upon developing guidelines for implementing lighting curfews on urban freeways, ; which have the potential to impact TxDOT’s ability to manage its lighting infrastructure in an advantageous ; manner. The guidelines developed through this project identify threshold criteria under which freeway main ; lane lighting can be turned off. The guidelines also identify conditions or exceptions under which lighting ; curfews should be suspended, modified, canceled, or not used at all (such as periods of inclement weather or ; during a major late-night event).
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    PDF
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    Filetype[PDF - 888.78 KB]
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    urn:sha-512:d0c15578cb9b8068897335cc6c47e262273208b7514942f1f4a4068e7055e356df598c7b2d126985f0f0ca35cb699443194be07065e04d418b2a8c389ba5551d
File Language:
English
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