Probe-Based Traffic Monitoring Systems with Wireless Location Technology: An Investigation of the Relationship Between System Design and Effectiveness

摘要: As agencies place more emphasis on monitoring and managing the roadway network, concept of traffic systems based wireless location technology (WLT) is generating increasing interest. WLT-based anonymously samples probes or drivers by using devices, such as cellular phones. By a series these probe vehicle locations, could generate true point-to-point speed estimates with minimal infrastructure investment. Unfortunately, early deployments have not been entirely successful in quality information needed transportation public. When are approached vendors systems, they little to determine whether system likely be effective. The relationship between design accuracy that it generates explored. A simulation-based approach was used define general guidelines for different aspects network characteristics. type map matching used, frequency position estimates, error geometry were shown significant impact accurate from system.