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Equipment for Collecting Traffic Load Data (2004) / Chapter Skim
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Pages 41-45

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 41...
... (For example, some agencies use dual-inductance loops to collect lengthbased truck classification data on urban freeways but axle sensor-based counters to collect classification data on rural roads. Special studies are needed to correlate these two data collection schemes.
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From page 42...
... (Is the pavement in too bad of a condition for WIM or classification equipment to operate correctly? Does the poor pavement condition warrant the use of non-intrusive data collection technologies either because intrusive sensors will not survive long or because the poor pavement will cause axles to jump the intrusive sensors?
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From page 43...
... If the proposed data collection site is due to be repaved in 2 years, it may not be appropriate to place sensors in the pavement. Or it may be less expensive to install non-intrusive sensors that can be used even after the pavement replacement takes place.
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From page 44...
... Because a specific technology appears to be a good fit for a specific application does not mean that all devices using that technology will work equally well. Specific implementations of a given technology from two different vendors can result in data of very different quality.
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From page 45...
... • Telephone, DSL, wireless Bandwidth required from device • Other • Frequency of communications General Technology Price Total Cost = Sensor Cost x Number of Sensors + Cost of Electronics Staff Training to Install, Operate, and Maintain the Devices Equipment Needed to Install, Operate, and Maintain the Device Published Accuracy Achieved with the Technology Has the technology been used previously? Previous Experience with this Technology/Vendor Vendor support offered/available TABLE 4.1 Sample equipment selection analysis summary sheet
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Key Terms

  • vehicle speed
  • inductance loops
  • expected life
  • vehicle classification
  • intrusive sensors

  • equipment selection
  • classification equipment
  • wim sensors
  • wim data
  • traffic volumes

  • devices using
  • pavement design
  • pavement condition
  • sensor technologies
  • permanently mounted

  • sensor cost
  • poor pavement
  • sensors placed
  • inductance loop
  • life span

  • lane lines
  • sensor life
  • axle sensor
  • traffic data
  • weight data

  • traffic control
  • axle count
  • data processing
  • highway agency
  • collection site


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