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Public-images-osm logo.svg enforcement
Fixed speed camera.svg
Devices that measure and document traffic violations and their coverage zone
* NodeWayArea - device
  • Node - from
  • Node - to
  • Node - force
Status: ApprovedPage for proposal-

This relation documents different kinds of permanently installed devices that measure and document traffic violations, such as:

  • speed traps
  • red light cameras
  • distance between vehicles measuring
  • weight check (heavy goods vehicles)
  • ordinary traffic checks (papers, use of alcohol, etc.)
  • compliance with road toll regulations (currently specifically the Toll Collect system in Germany)

These devices belong to the same class of objects and shall therefore use the same tagging schema with different values. Sometimes a combination of values is required if the device serves more than one function (e.g., both a speed trap and red light camera in one device).

Where to map?

Note that some countries that forbid mapping traffic enforcement installations. If rendering or displaying in a routing software or alerting in a routing software is forbidden anywhere, you can add the information to the map - renderer and routing software will make sure to follow the law. Therefore, routing software shall offer traffic enforcement features as plug-ins, so the user can choose if he wants to install the feature.


Traffic enforcement devices are not a place you'd want to go and are therefore not an amenity.

Create a single relation for each traffic enforcement device, if there are several, as each can measure different things to vehicles from different directions.

Key Value Example Comment
type enforcement enforcement The type of relation.
enforcement maxheight / maxweight / maxspeed / mindistance / traffic_signals / check / access maxheight The type of enforcement.
enforcement toll toll HGV toll enforcement camera bridges in Germany (see Wikipedia Toll Collect on Wikipedia), checking system compliance.

For normal toll bridges that directly trigger the payment please use barrier=toll_booth

maxheight number; specify unit if not in metres 4 The maximum height (only specify if enforcement=maxheight)
maxweight number; specify unit if not in tonnes 16 The maximum weight (optional, only specify if enforcement=maxweight)
maxspeed number; specify unit if not in km/h 60 The maximum speed (only specify if enforcement=maxspeed)

The "mindistance" enforcement is for following distance. The "check" enforcement is for a checkpoint.


Type Role Recurrence? Comment
NodeWayArea device one or more Where the enforcement device is located. For a large device (e.g., an HGV scale), a way or area may be preferred (but must be connected to the same way). Note that the device might not be on the same way as the from (and optional to) nodes; e.g., a speed camera will often be on the side of the road).
Node from one or more Choose a node on the highway from where the vehicles checked come. If there is a sign "radar controlled" or "traffic signals ahead" put the node where the sign is. if there is no sign, estimate a sensible distance where a driver would need to be warned of the object if driving with allowed speed.
Node to one or more - in some cases optional Where the enforcement ends.
  • Optional if device and from are on the same way. In this case, the device acts as the to member.
  • Required if device and from aren't on the same way (e.g., speed camera, turn restriction), to make clear in which direction the enforcement occurs.
Node force one or more - optional A traffic light or barrier that stops you if you violated a rule (because it is dangerous).


See the original proposal


See also

Original proposal