Collecting the data
We collect data continuously at national telemetry sites using:
- bending plates scales (at four sites) to measure axle loadings
- dual inductive loops (at 79 sites) to classify vehicles by length
- Piezo electric axle classifiers (at one site) to classify vehicles by axle.
We also randomly collect data using:
- dual inductive loops (at 356 sites) to classify vehicles by length
- single inductive loops (at 707 sites) to count vehicles
- pneumatic tubes (at 313 sites) to classify vehicles by axle
- virtual counters (at 259 sites), which calculate information from adjacent sites.
For more information
View the available reports on traffic data:
- State highway traffic volumes monthly report
- State highway annual traffic data booklet
- Traffic Monitoring of State Highways Manual
Contact us for more information on telemetry sites and general traffic monitoring.
