Proposal:Default Maxspeed
- Status
- proposal
- Proposed-by
- Cohort
- Proposal-date
- 13 January 2008
Rationale
Many areas (states, cities, etc) have a default speed limit on their streets when there is no specific signage posted. It therefore seems counter-productive to mark all ways individually with a speed limit. I feel that there should be a way to indicate the default rule for an area, which would then be superseded by individually posted street limits.
The rule would work as follows:
- If a given way has a maxspeed attribute, use that.
- If no maxspeed rule is given, search each successively enclosing area - from smallest to largest - for an appropriate default_maxspeed attribute to use.
- If no rule is found, fail over to some reasonable default based on way type.
Proposed tags
- default_maxspeed:all=* - applies to all ways in a given area.
- default_maxspeed:way_type=* - applies only to ways of given type.
- default_maxspeed:veh_type=* - applies only to vehicles of given type. (Ex.: hgv, bus)
- default_maxspeed:*:left=* - applies only to ways to the left of the tagged boundary
- default_maxspeed:*:right=* - applies only to ways to the right of the tagged boundary
Applies to
This tag applies to areas and boundary ways.
Usage examples
If only a single default maxspeed applies to a given area, default_maxspeed:all=* should be used.
Ex.: The city of Bothell, WA, USA has a default speed limit within its border of 25 mph for all streets unless posted otherwise. Assuming Bothell is on the left side of a given boundary way, it would be tagged with default_maxspeed:all:left=25 mph.
Proposed Rendering
None. These tags would be primarily useful for routing applications.
Comments
I would want to have something like: default <countryname:waytype>. E.g maxspeed=default:austrian_motorway. This would allow routers to parse the values and calculate with the right value (and has not to look where the next boarder is). --Krasnoj 00:48, 15 September 2008 (UTC)
Consider using the Relations/Proposed/Defaults
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