Applications of Illuminated, Active, In-Pavement Marker Systems (2008) / Chapter Skim
Currently Skimming:
Pages 38-42
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 38... ...
More recently, IPM systems have been used to enhance: • Warning through school and construction zones, at highway–rail crossings, at horizontal curves, and during adverse weather; • Guidance through multiple-turn lanes, at merge locations, and through tunnels; • Regulation at intersection stop bars and where left turns are prohibited; and • Illumination at vehicle and truck inspection points and environmentally sensitive areas. Technology Characteristics Generally, IPM systems consist of an illumination source surrounded by a protective housing and lens, a power source, and a system controller in a protective enclosure.
|
From page 39... ...
Power Source IPM systems can derive power to operate through hardwired electrical connections, inductive wireless connections, or solar technology. To date, hardwired electrical connections and inductive wireless connections have outperformed (i.e., higher luminous intensity, more consistent operation)
|
From page 40... ...
Chase sequencing has been used to maintain or reduce vehicle speeds in fog-prone areas and to reduce vehicle speeds on exit ramps. Other potential applications include horizontal curves, tunnels, merge areas, or construction work zones.
|
From page 41... ...
warning through school and construction zones, at highway–rail crossings, at horizontal curves, and during adverse weather; (2) guidance through multiple-turn lanes, at merge locations, and through tunnels; (3)
|
From page 42... ...
• Warrants are likely not required or appropriate for IPM systems; IPM systems typically supplement existing traffic control treatments and/or devices. • Methods to describe the relationship between IPM systems and other ITS devices and systems and promote their use within ITS architectures and planning efforts could be beneficial in encouraging implementation.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.