[Tagging] Default access for service=driveway?

[Jmapb]

On 12/22/2020 4:14 AM, Frederik Ramm wrote:

> 1. Should a routing engine automatically assume that something tagged a
> "driveway" is not suitable for through traffic?

"Not suitable for through traffic" would be a good rule for motor
vehicles IMO.

For bicycle and foot traffic, it depends... For residential driveways,
I'd use the same rule as vehicles. For most other kinds of driveways
(retail, commercial, government, religious, recreational, educational) I
would generally assume an implied right-of-way for foot and bicycle
through traffic, barring any known restrictions. I would, however,
suggest that a router gives these a little negative weight if possible,
to prefer a public route unless the shortcut is profound.

There's some use (~1500 worldwide) of the highway=service +
service=driveway + driveway=residential tag chain, and if that
information is useful for routers I'd be happy to start adding the
driveway=residential tag. Better IMO than arbitrarily assigning an
access tag to a highway with no access signage.


> 2. If you map such driveways, would you add access=private (or
> access=destination) in OSM...
> 2a. ... even if there is no specific signage locally?

I confess to tagging access=destination on occasion, when I see a risk
of a router sending through traffic along what I deem to be a private
driveway, even if there's no gate or signed restriction. Eg
https://www.openstreetmap.org/way/882583012


> 2b. ... if there is a sign that says "access to houses X,Y,Z" without
> saying that other access is forbidden?

I don't think this needs an access tag.


> 2c. ... if there is a sign that says "private driveway"?

"Private driveway" I might might tag access=destination. "Private
driveway, residents and guests only" would definitely get
access=destination. "Private driveway, keep out" would bump it to
access=private.


Jason