DfT Road Traffic

DfT Road Traffic Statistics

Official Department for Transport road traffic count data for Great Britain. No authentication required.

Data Model

• Count Point — A fixed location on the road network where traffic is counted. Has a count_point_id, road name, road category, coordinates, and link length.
• AADF — Average Annual Daily Flow. Estimated vehicle counts per day, broken down by vehicle type. One record per count point per year.
• Region — One of 12 statistical regions (plus Scotland and Wales). Has ONS code.
• Local Authority — Council area containing count points. Has ONS code.

Vehicle Type Fields (AADF)

• pedal_cycles, two_wheeled_motor_vehicles — Non-car vehicles
• cars_and_taxis — Cars and taxis combined
• buses_and_coaches — Public transport
• lgvs — Light goods vehicles (vans)
• hgvs_2_rigid_axle through hgvs_6_articulated_axle — HGV subtypes
• all_hgvs — All HGVs combined
• all_motor_vehicles — Total motor vehicles (excludes pedal cycles)

Road Categories

• TM — Trunk Motorway, PM — Principal Motorway
• TA — Trunk A road, PA — Principal A road
• TB — Trunk B road (rare), U — Unclassified

Gotchas

• Pagination: Results are paginated. Use page parameter (1-indexed). Response includes current_page and total_pages (when available).
• Limit: Use limit to control results per page (default varies).
• Year coverage: AADF data typically runs from 2000 to 2-3 years ago.
• Estimation methods: Many count points use estimated data rather than actual counts.