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Available languages — Key:source:maxspeed
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Public-images-osm logo.svg source:maxspeed
Zeichen 282.svg
Records the source for a speed limit, either a sign, a context (default limit) or a speedlimit zone
Group: Annotation
Used on these elements
may be used on nodesmay be used on waysmay be used on areasshould not be used on relations
Useful combination


Status: Unspecified

The source:maxspeed=* tag records the source of a road's maximum Speed limit as provided in the maxspeed=* tag to assist with Verifiability. This may be a sign giving a numeric maximum speed, or a 'zone' from which the appropriate numeric speed limit can be determined by knowledge of local traffic laws.

Howto tag

See also: Speed limits
  • sign (where the speed limit is defined by a numeric sign.)
  • markings (where the speed limit is defined by painted road markings.)
  • <country_code>:<context> (where the speed limit is defined by a particular context, for example urban/rural/motorway/etc.)


An urban road in Italy would be tagged:

  • maxspeed=50 and source:maxspeed=IT:urban

Where the speed limit is indicated by special speed limits signposted at the zone boundaries they can be tagged as follows:

  • maxspeed=30 and zone:maxspeed=DE:30 - Most used value (used 19k times in May 2014)
  • maxspeed=30 and source:maxspeed=DE:zone:30 - Second most used value (used 13k times in May 2014)
  • maxspeed=30 and source:maxspeed=DE:zone30 - Third most used value (used 11k times in May 2014)
  • maxspeed=30 and source:maxspeed=DE:zone - Proposed by a discussion on a mailing list citisation needed (used 4k times in May 2014)

Commonly used values

source:maxspeed value maxspeed value
DE:rural 100
DE:urban 50
FR:rural 90
FR:urban 50
IT:rural 90
IT:motorway 130
IT:urban 50
JA:nsl 60
JA:express 100
ON:urban 50
ON:rural 80
RO:motorway 130
RO:rural 90
RO:trunk 100
RO:urban 50
RU:rural 90
RU:urban 60
GB:motorway 70 mph
GB:nsl_dual 70 mph
GB:nsl_single 60 mph
UK:motorway 70 mph
UK:nsl_dual 70 mph
UK:nsl_single 60 mph

Note on British Usage

Some mappers use source:maxspeed=* to tag the source of the information as for other tags of the form source:*. In Great Britain prolonged discussion of this point on talk-gb resulted in agreement to use source:maxspeed for the data source (survey, Open Data, etc) and maxspeed:type=* for the information described on this page. reason for the maxspeed and use this tag to store how the information was collected (survey, import, etc.). This usage is more consistent with the general pattern of tagging. It also resolved a conflict about how unsigned national speed limits should be tagged.