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B2. Vehicle-Based Surveys ISCTSC 2008 – Annecy, France

B2. Vehicle-Based Surveys ISCTSC 2008 – Annecy, France. Administrative data. Vehicle Registration files are maintained by nearly all countries Provides detailed information on the vehicle fleet Can use registry files to sample motor vehicle use

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B2. Vehicle-Based Surveys ISCTSC 2008 – Annecy, France

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  1. B2. Vehicle-Based SurveysISCTSC 2008 – Annecy, France

  2. Administrative data • Vehicle Registration files are maintained by nearly all countries • Provides detailed information on the vehicle fleet • Can use registry files to sample motor vehicle use • Vehicle inspection programmes potential source of odometer readings (VKT) • Issues • File integrity • scrapped vehicles not removed • Confidentiality • Not every country allows access for sampling • Coverage • Foreign vehicles not covered

  3. Roadside interviews • Largely local in scope • Cordon/screenlines in urban areas • Helsinki/Stuttgart ANPR-based O-D surveys • Toll road planning • Methodology issues • O-D flows dependent on where the vehicles are surveyed (geographic bias) • Study area needs to be tightly defined • Requires field deployment • Safety concerns • Burden (survey needs to be short) • Data quality since sites are temporary

  4. Traffic counts • Nearly universal • Data are collected for a network of permanent/short-term sites using machine-based and manual counts • Works best on motorways/arterials • Can estimate VKT by road class and vehicle class • Management of networks a challenge • Sites widely dispersed • High maintenance and data collection costs • Truck classification differs across countries • comparability

  5. Different Technologies (1) • GPS • Offers routing, more precise O-D, time/speed profiles, elevation • Cold start problem leads to gaps • Urban canyons/tunnels block signal • Purpose not known but can impute from land use • On-Board Diagnostics (OBD-II) • All North American vehicles model year 1996 and newer must carry an OBD-II data port • Can collect extensive vehicle performance information passively • Instantaneous fuel use • Speed ranges • Coolant temperatures

  6. Different Technologies (2) • Automatic number plate recognition (ANPR) • Use camera and OCR technology to collect license plate data • Travel time/O-D via direct plate matching • Can use vehicle registry as a sampling base (not available in all jurisdictions) • Uses • Enforcement • Fraud detection • Heavy goods movement • Foreign vehicles

  7. Different Technologies (3) • Electronic toll tags • Electronic number plates • Weigh-in-motion • Cell-phone tracking • Assisted GPS (A-GPS)

  8. Research priorities for vehicle-based surveys • Fuel and emissions • More detailed information on fuel use/emissions profiles • Road safety • Where accidents occur (GPS) • Road user charging • Tapping full use of new technologies • Reduce burden of collecting vehicle use data

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