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Types of Road

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The Ultra Pre-Processor applies road speeds according to the road type identified in the highway tag in the source OpenStreetMap data. By default, the following highway tag values are considered routable:

 

motorway

Restricted access major divided highway.  E.g. motorway, freeway, autobahn

trunk

Most important roads that are not motorways

primary

Next most important roads (e.g. link larger towns)

secondary

Next most important roads

tertiary

Next most important roads (e.g. link villages)

unclassified

The smallest roads (e.g. an English lane). This is an old UK term.

residential

Roads that access housing

service

Access roads to industry, business parks, etc. Includes alleys.

motorway_link

Slip roads and ramps that connect motorways

trunk_link

Slip roads and ramps that connect trunk roads

primary_link

Slip roads and ramps that connect primary roads

secondary_link

Slip roads and ramps that connect secondary roads

tertiary_link

Slip roads and ramps that connect tertiary roads

living_street

Residential streets where pedestrians have legal priority. Lower speeds.

track

Roads mostly for agricultural or forestry access

road

Any road of unknown classification.

 

 

By default, the following highway tag values are filtered out and considered non-routable:

 

bus_guideway

Guided bus not suitable for other traffic

raceway

Track for motor racing

pedestrian

Pedestrian only & roads with restricted vehicle access at specific times of the day

footway

Footpath

bridleway

For horses

steps

Flight of steps

path

Non-specific path

cycleway

Cycle path

proposed

Planned highway

construction

Highway under construction

escape

Runaway truck ramps and truck arrester beds.

rest_area

Area for drivers to rest but not re-fuel

services

Service station, e.g. for food and fuel

corridor

Indoor corridor

crossing

The pedestrian part of a pedestrian crossing

 

Some highways can also be marked with minspeed and/or maxspeed tags. You can tell the Ultra Pre-Processor to either use these (the default) or ignore them. These work as min/max speed range limits. For example, if you have defined a highway type to have a speed of 70mph, but a section of that highway has a maxspeed of 55mph, then Ultra Pre-Processor will use the 55mph speed.

 

More detail on the recommended usage of the OpenStreetMap highway tag can be found in the OpenStreetMap wiki.