Traffic data glossary

A structured record of road-user activity at a defined location and time.

A record of left, right and through movements at an intersection.

An entry-to-exit record of movements through named roundabout arms.

A directional count across a defined road-section reference line.

A traffic count conducted on a road section between intersections.

A count of agreed approaches, movements and modes at a junction.

Automatic Traffic Count, usually a continuous or temporary counter that records volumes over time.

The highest observed volume period within a defined analysis window.

A specified busy period, such as the morning or evening commuter window.

Grouping observed road users into an agreed category scheme.

A project-defined freight or larger-vehicle category; the exact rule must be stated.

A project-defined light goods or commercial vehicle class.

The time or distance between successive vehicles passing a reference point.

The measured extent of a vehicle queue on an approach, from an agreed reference point.

A survey that records vehicle speeds for an agreed location, period and analysis method.

A study of movements between defined origins and destinations.

Automatic Number Plate Recognition; used only with appropriate privacy controls and lawful processing.

Human-led processing of suitable project footage into agreed traffic observations.

A record of people passing a defined screenline, crossing or facility.

A record of bicycle movements at a defined location and time.

The proportion or number of eligible parking spaces occupied during an observation period.

The number of vehicle-use changes for a defined parking space or area, using an agreed method.

The observed time a vehicle or person remains within a defined area, where the method supports it.

A visual summary of approach-by-approach movements at a junction.

The reporting unit used to group observations, such as 5, 15 or 60 minutes.

The defined location, approach or screenline at which observations are recorded.

An imaginary or marked line across which movements are counted.

The approved list of field names, classes, definitions and rules for a project dataset.

A documented check for completeness, consistency and compliance with the agreed specification.

Quality assurance and quality control: planned checks during and before delivery.

The physical area, movement path or facility included in the agreed count scope.

When one object blocks part of another from the observer or camera view.

A structured list of allowed approach-to-exit or directional movements for a study.

Example values shown only to explain a format; not a project result or benchmark.

Small transport modes such as e-bikes and e-scooters counted under an explicit project rule.

The observed time a vehicle remains in a defined parking area, using an agreed matching method.

The number of vehicles present in a defined area at a stated observation time.

Observed use expressed against the eligible capacity or inventory defined by the study.

The movement of road users through a point, section or network during a stated period.

The count of road users crossing a defined reference point or movement path.

A named direction or arm leading into an intersection or roundabout.

A junction arm or road connection forming part of an intersection layout.

A movement that reverses direction within the defined junction or roadway scope.

The coded travel direction applied consistently to each observation.

A count organised by the lane or lane group used by each road user.

The distribution of observed trips or movements by mode, such as car, bus, bicycle or pedestrian.

A project or jurisdiction-defined heavy goods vehicle category; do not assume one universal rule.

A truck class with a fixed body arrangement where the project scheme defines it as such.

A tractor-and-trailer combination classified under the approved project rule.