[OSRM-talk] unknown access tags

[Florian Lohoff]

Hi,
i stumbled upon a vehicle=delivery;private which caused the OSRM default
profile to allow any traffic on that road (Access to a motorway service
area) which is obviously broken.

I think i understand the code and the issue is that 

a) OSRMs car profile does not understand ";" in access tag values
b) Interprets unknown values as - "Seems to be fine to use it"

So fixing a) would be one of the most obvious thing to do,
i am just playing with code on this issue.

But i think about b) - As i'd rather interpret unknown values as
inaccessible as there are (without additional knowledge) only 2 values
which are fine - thats "yes" and "permissive" - Everything else is
either restricted or inaccessible.

So having a positivelist for access tags (yes + permissive), and a
restricted positive list (stuff like destination, permit, private,
customer, hgv etc) would be the way.

Every "vehicle=foobar" would then produce fallout and make the road
inaccessible. So mappers inventing new access tag values would
get whatever they intendet.

Thoughts?

Flo
-- 
Florian Lohoff                                                     f at zz.de
  Any sufficiently advanced technology is indistinguishable from magic.
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