Hi Andrew,
I sparked a quick discussion yesterday in the IRC channel,
and there was consensus about:
- we should not use the plain 'ref' key for the exact reasons you mentioned
- they are unlikely to be posted along the ramps themselves
- we should get the data into OSM under a different key, that is not
used by map generators for satnav systems
Some different opinions about the actual key, including
loc_ref, ref:signed=no, ref:non_navigational.
cheers
Tom
Andrew McCarthy typed this message, on 2011-07-02 19:30:
Hi folks,
Here's an odd one, in reference to junction 12 on the M7:
http://www.openstreetmap.org/?lat=53.16201&lon=-6.82362&zoom=16&layers=M
Take a look the Kildare "Review of Speed Limits 2010":
http://kildare.ie/CountyCouncil/Transportation/SpeedLimitReview/LinkToDocument,21745,en.pdf
At the bottom of page 15 / start of page 16 it describes Ballymany
Interchange, and it describes the speed limits of on and off-ramps of the
Motorway as
follows:
"(d) The Eastbound on ramp (L-30082) from its junction with the
northern roundabout to a point 37 meters southeast of said
junction.
"(e) The Eastbound off ramp (L-30081) from a point 20 meters
southwest of its junction to the northern roundabout to said
junction.
"(f) The Westbound off ramp (L-30083) from a point 80 meters
northeast of its junction with the Southern roundabout to said
junction.
"(g) The Westbound on ramp (L-30084) from its junction with the
Southern roundabout to a point 50 metres northwest of said
junction."
It'd be technically correct to have that as the ref for the ramps, but
routing instructions would be dreadful and nobody would thank us for it.
On the other hand I'd hate to just ignore it now that I've figured it
out :)
Has anyone seen this before or have any suggestions on tagging this one?
"loc_ref=...", maybe?
Andrew
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