原文传递
Improving Freeway Traffic Speed Estimation Using High-Resolution Loop Detector Data.
| 题名： | Improving Freeway Traffic Speed Estimation Using High-Resolution Loop Detector Data. |
| 作者： | Liu, H. X.; Sun, J. |
| 关键词： | Calibration; Freeways; Highway Transportation; Implementation; Inductive Loop Detectors; Methodology; Monitoring; Resolution; Speed; Traffic Flow; Traffic Signals; Vehicular Traffic Control |
| 摘要： | In this project, we developed an innovative methodology to solve a long-standing traffic engineering problem, i.e. measuring traffic speed using data from single inductive loop detectors. Traditionally, traffic speeds are estimated using aggregated detector data with a manually calibrated effective vehicle length. The calibration effort (usually through running probe vehicles), however, is time consuming and costly. Instead of using aggregated data, in this project, our data collection system records every vehicle-detector actuation 'event' so that for each vehicle we can identify the time gap and the detector occupation time. With such high-resolution 'event-based' data, we devised a method to differentiate regular cars with longer vehicles. The proposed method is based on the observation that longer vehicles will have longer detector occupation time. Therefore, we can identify longer vehicles by detecting the changes of occupation time in a vehicle platoon. The 'event-based' detector data can be obtained through the implementation of the SMART-Signal (Systematic Monitoring of Arterial Road Traffic Signals) system, which was developed by the principal investigator and his students in the last five years. The method is tested using the data from Trunk Highway 55, which is a high-speed arterial corridor controlled by coordinated traffic signals. The result shows that the proposed method can correctly identify most of the vehicles passing by inductive loop detectors. The identification of long vehicles will improve the estimation of effective vehicle length on roads. Consequently, speed estimation from the inductive loop detector is improved. |
| 报告类型： | 科技报告 |
相关文献
- Improving Truck and Speed Data Using Paired Video and Single-Loop Sensors.
- Accurate Speed Estimation Using Single Loop Detector Data.
- Estimation of Crossing Conflict at Signalized Intersection Using High-Resolution Traffic Data
- Using Detailed Signal and Detector Data to Investigate Intersection Crash Causation.
- Using Detailed Signal and Detector Data to Investigate Intersection Crash Causation.
- Improving Dual-Loop Truck (and Speed) Data: Quick Detection of Malfunctioning Loops and Calculation of Required Adjustments.
检索历史
应用推荐
