EVALUATION OF SENSORS FOR MONITORING TRUCK SPEEDS. INTERIM REPORT
This study evaluated the applicability, durability, and accuracy of two general systems of sensors that were used to monitor truck speeds on a freeway connector: 1) pavement sensors mounted on the surface or submerged into the pavement, and 2) roadside sensors using an infrared beam technology. Pavement sensors were predominantly temporary piezoelectric sensors, although inductive loops complemented one set of piezo sensors. These pavement sensors generated signals that were processed by vehicle classifiers to produce either "binned" data or "raw" data for all vehicles using the monitored roadway. Roadside sensors monitored vehicles that exceeded a preset height, length, and speed. Findings indicate that temporary piezo sensors are accurate for use as speed, count, and classification studies, but their service life (durability) was highly variable and undesirably short in many cases. Installation and maintenance of these sensors were problematic due to interference with traffic. Infrared sensors, on the other hand, were less intrusive to the traffic stream during installation and maintenance, and they performed well with little maintenance for time periods of one year or longer.
- Research study title: Urban Highway Operations Research and Implementation Program.
Arlington, TX United States 76011
Austin, TX United States 78763-5051
Washington, DC United States 20590
- Middleton, D R
- Publication Date: 1993-11
- Features: Appendices; Figures; Photos; References; Tables;
- Pagination: 60 p.
- TRT Terms: Accuracy; Building; Durability; Facilities; Infrared detectors; Installation; Maintenance; Measurement; Monitoring; Piezoelectric transducers; Sensors; Speed detectors; Trucks; Vehicle classification
- Uncontrolled Terms: Piezoelectric sensors
- Old TRIS Terms: Pavement mounted sensors; Roadside sensors; Speed sensors
- Subject Areas: Construction; Highways; Maintenance and Preservation; Motor Carriers; Operations and Traffic Management; I73: Traffic Control;
- Accession Number: 00662900
- Record Type: Publication
- Report/Paper Numbers: FHWA/TX-93/1232-21, Res Rept 1232-21, TTI: 0-1232
- Contract Numbers: Study 0-1232
- Files: TRIS, USDOT, STATEDOT
- Created Date: Jul 22 1994 12:00AM