Relation:manoeuvre

A manoeuvre (maneuver) relation overrides a router's classification of a particular manoeuvre at a junction. It is a last-resort hint for when a router cannot reasonably infer the correct turn instruction at a complex junction based on common heuristics like the turn angle or number of connecting ways.

Usage

Despite this relation type, tagging that caters to the idiosyncracies of a particular router is discouraged. Manoeuvre relations can be seen as less harmful than contorting the road geometry or adding fake streets, which can be detrimental to accurate rendering. Before resorting to a manoeuvre relation, check whether routers produce the correct guidance instruction for the manoeuvre. If one router produces suboptimal guidance while the others produce acceptable guidance, it may be a bug in that one router – be sure to report the issue to the router's developers.

How to map

As with a turn restriction relation, the relation's members should include the ways that approach and lead away from the junction, along with the node at which the manoeuvre is performed.

A manoeuvre relation is tagged with the following tags:

type=manoeuvre

manoeuvre=*

The type of manoeuvre. OSRM recognizes the following values:

• manoeuvre=uturn
• manoeuvre=continue
• manoeuvre=turn
• manoeuvre=fork
• manoeuvre=suppress

direction=*

The direction of travel. OSRM recognizes the following values:

• direction=sharp_left
• direction=left
• direction=slight_left
• direction=straight
• direction=slight_right
• direction=right
• direction=sharp_right

Note that the tag values understood by OSRM differ from valid turn=* values: uturn instead of reverse, straight instead of through.

Software support

This relation type is intended as an override of routing engine behaviour. OSRM 5.16.0 added support for type=maneuver relations, using the American spelling. OSRM 5.17.0 added support for the type=manoeuvre and type=maneuvre spellings, the former of which is now preferred by OSRM. In the future, more support for turn=* in OSRM may make some manoeuvre relations unnecessary.

There is no preset for manoeuvre relations in iD, but you can create a turn restriction relation using the mini-editor, then replace type=restriction restriction=* with type=manoeuvre manoeuvre=* direction=*.

Tagging errors

The British spelling manoeuvre=* is preferred, but OSRM also supports the American spelling maneuver=* and a common misspelling, maneuvre=*:

See also

• not:=* another tool for overriding software behaviour
• turn=*
• junction=*
• Relation:connectivity

External links

• Manoeuvre override tag – full details, illustrations, and rationale at the OSRM wiki
• Turn instruction override – an analogous concept used by Waze mappers