The Highways view in OSM Inspector shows problems with highway tags.
Highways (streets, roads, ...) are one of the most important features in OSM. This view helps finding problems on highways such as missing names, unusal highway types or wrong oneway tags.
All data in this view is derived from OSM data.
Data for the whole world is available in this view.
The layers are organized into three sections:
There are about 20 highway types from highway=motorway to highway=path that are used often and properly documented. Some other types are used less frequently and/or are not documented. Some other highway types indicate incomplete or obsolete information.
The Unknown layer shows highways with unknown type. This isn't necessarily an error, but in many cases it is.
The layer highway=road shows ways tagged with highway=road. This indicates that the actual road type is unknown, for instance because it came from an aerial image. This is not an error, it just means that the information is incomplete and has to be added at some point.
The layer None (major roads) shows all ways tagged with a highway type of motorway, trunk, primary, secondary, or tertiary that have neither a name=* nor a ref=* tag. Most of the roads of these types should at least have a ref=*.
The layer None (minor roads) shows all ways tagged with a highway type of residential, living_street, or pedestrian that have neither a name=* nor a ref=* tag. Most of the roads of these types should at least have a name. In some cases the roads have been misclassified (often residential instead of unclassified or service) and the type should be corrected. Because this happens very often in the TIGER import, the ways tagged highway=residential coming from this import are not showing up in this view, there would be far too many cluttering up everything.
The Fixme layer shows highways with names such as fixme or unknown.
In this section problems with further attributes of roads are highlighted.
The Oneway layer shows ways tagged with oneway=* with an unknown value. Only the values yes (preferred), no, 1, -1, true, and false are recognized.
The Lanes layer shows ways tagged with lanes=* with unkown value. The value should be an integer between 1 and 9.
The Maxspeed layer shows ways tagged with maxspeed=* with unknown value. Only numbers, optionally with a suffix mph and some other often used values such as unlimited are recognized. Ways that show up here should probably be fixed to conform to some of the more common formats.
The Maxheight layer shows ways tagged with maxheight=* with unknown value. Some common formats with simple numbers (meaning its in meters) or feets and inches are recognized. Ways that show up here should probably be fixed to conform to some of the more common formats.