[OSM-talk] TAG-Suggestion: highway:trailer_shipment (Carsten Moeller)

[Richard Bullock]

> A highway=steps would imply you can use your car here.

????
http://wiki.openstreetmap.org/wiki/Image:Steps.jpg
You wouldn't *seriously* consider driving up or down a flight of 
steps...surely??

> If I understood the intention correctly then highway is something you can 
> drive on.

No. The highway key is a group of tags, some of which would imply you can 
drive on, some you cannot. In England, a public highway could include a 
narrow footpath through a field, where cars are forbidden and it could be 
completely unsuitable for vehicles - up to an 8-lane motorway, where 
pedestrians are forbidden.

The only ones I'd consider that a car could route over would be
highway= motorway
                trunk
                primary
                secondary
                tertiary
                unclassified
                service
With the possible addition of
                track or byway as a last resort