OSRM v5.5.0

Tags

• Added a more accurate weight penalty for ways tagged with oneway=alternating. These tags are for narrow bridges or tunnels on which the direction of traffic alternates every n minutes and are sometimes traffic light controlled.
• Brought guidance support in line with guidance on roundabouts for junction=circular tagged junctions. These junctions can be thought of as roundabouts where traffic within the roundabout does not always have right of way (examples [1], [2]).
• Support for destination:forward, destination:backward, destination:ref:forward, destination:ref:backward also in combination with oneway=-1 tags.

Guidance

• Polished up turn angle classification by detecting offsets due to lanes and minor variations due to data modelling inaccuracies. Turn angles now better resemble what users experience.
• More accurate classification of sliproad scenarios (examples [1], [2]). When the maneuver is obvious, we now emit a single instruction for turning onto and then immediately off of sliproads.
• Improvements to the name change heuristic reduce new name announcements.

API

• We now support precision 5 (default) and 6 polyline geometries with the new parameter, geometries=polyline6.

Infrastructure

• Improvements to the Hilbert space filling curve contribute to improvements to geospatial lookup performance.
• The ever useful Debug Map now displays turn penalties at higher zoom levels.
• We now provide online documentation for the API (requests, responses, examples).
• Shared memory now supports multiple clients (multiple instances of libosrm).
• Improved error reporting, especially for I/O and file loading.

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