Relation:enforcement
 enforcement
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Devices that measure and document traffic violations and their coverage zone 
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| Group: Restrictions |
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| Wikidata |
| Search Wikidata |
Status: approved
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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)
- Average Speed Check (SPECS)
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 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.
Tags
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 |
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| type | enforcement | enforcement | The type of relation. |
| enforcement | maxheight / maxweight / maxspeed / average_speed / mindistance / traffic_signals / check / access | maxheight | The type of enforcement. |
| enforcement | toll | toll | HGV toll enforcement camera bridges and pillars in Germany (see Toll Collect on Wikipedia), checking system compliance.
For normal toll bridges or gantries with no barrier to impede traffic that directly trigger payment please use highway=toll_gantry |
| 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.
Members
| Type | Role | Recurrence? | Comment |
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device | one or more | Placed where the enforcement device is located. For a large device (e.g. an HGV scale), a way or area may be preferred (that 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). |
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from | one or more | Node on the highway from which the enforcement is checked. Placed at the same place as signs (e.g. "radar controlled", "traffic signals ahead") if present. If not, estimate a sensible distance where a driver would need to be warned of the enforcement if driving with allowed speed, or the usual legal distance of such warning. |
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to | one or more - in some cases optional | Node where the enforcement ends.
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section | one or more | Line for the section control (SPECS / Section Control) |
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force | one or more - optional | A device (e.g. light or barrier) which enforce the rule being applied in the relation. |
Examples
See the original proposal
Rendering
See also
- Original proposal
- highway=speed_camera – another tagging scheme for speed limit enforcement cameras
- highway=speed_display - a dynamic electronic sign that displays the speed of the passer-by motorist
- amenity=weighbridge - a large weight scale to weigh vehicles and goods
