[Routing] Safe pedestrian routing profile

[Josh Doe]

Has anyone done something with safe pedestrian routing profiles? I'm
trying to pull criteria together for a project of mine, and would like
it if others could provide their input. You can read it on the wiki,
but I've reproduced it below as well:
http://wiki.openstreetmap.org/wiki/Safe_Routes_to_School_Mapping_Toolkit#Routing_profiles

== Safe walking, least distance ==
*   Allow use of highway=footway, highway=path, highway=cycleway,
highway=steps, highway=living_street, highway=pedestrian,
highway=bridleway, highway=service, and highway=residential unless
there is a foot=no/private tag.
*    Disallow use of all other highway=* segments unless it has
sidewalk=yes/both/left/none.
*    Disallow crossing of above segments unless there is a
highway=crossing or highway=traffic_signals node at the intersection
(e.g. routing along a highway=residential across an uncontrolled
intersection with highway=secondary would not be allowed).

== Safer walking, least distance ==

This could be the same as the above, except it wouldn't allow use of
ways with sidewalk=*, since it can't be known if there is safe
crossing infrastructure. Also, routing across highway=traffic_signals
would not be allowed, as there is no guarantee of a safe crossing
(dedicated/marked pedestrian crossing should have it's own
highway=footway).

Thanks,
-Josh