[Talk-us] Prima Facie Speed Limits

Paul Johnson baloo at ursamundi.org
Mon Sep 15 08:15:32 UTC 2014

65: Highest posted speed limits in Oregon.
75: Highest speed authorized to ODOT for a posted speed limit (so far,
unused, any paved route using a speed limit higher than 65 MPH is
automatically wrong as of this writing)
88: Open desert/dune speed limit (never posted, rarely enforced)
99: Fastest speed allowed anywhere in Oregon without being potentially
charged as a felony (I narrowly avoided a felony doing 117 in the Oregon
Dunes when Oregon State Police by virtue of my sandrail lacking a speedo
and being from out of state, despite having a GPS I was pretty much
ignoring thanks to it waving around everywhere, until it was time to return
it; Don't Go Faster Than This unless you want to have somewhere between a
Bad Time and Prison Time).

On Mon, Sep 15, 2014 at 3:09 AM, Paul Johnson <baloo at ursamundi.org> wrote:

> On Sun, Sep 14, 2014 at 6:52 AM, Tod Fitch <tod at fitchdesign.com> wrote:
>> maxspeed:source=* was a "thinko" (kind of like a typo but different part
>> of the body). :)
> OK, probably, but it does sort nicely in JOSM.  Either way, feel free to
> fix my mistagging on this...I've used maxpseed:source=* on a few counties
> now and if I got the key backwards, feel free to fix.  I'm not going to
> argue over extremely minor semantics like this.
> The jumbled pseudokey value "us:ca:residential" was inspired by
>> http://wiki.openstreetmap.org/wiki/Key:source:maxspeed used elsewhere in
>> the world (e.g. "source:maxspeed=DE:urban"). But I would be happy with
>> "default speed limit for unposted streets in California", or a shorter
>> string like "California vehicle code 22352".
> I would actually rather cite the code in question, or when in doubt, the
> source signs.  I'll personally vouch for Oklahoma zone speeds (if they're
> 45 or, rarely 35, for county; or 25 for pretty much all of a minor town,
> assuming the state road leading into it has the appropriate stepdowns.)
> That said, all of Oregon could be tagged as the following, in MPH, if not
> otherwise tagged:
> 3: ODOT scales
> 5: ODOT rest areas and scales.
> 10: Longer ramps in ODOT rest areas and scales.
> 15: Alleyways.
> 15-50: Variable speed zones within urban Portland.
> 20: School zones when flashing or children present.
> 25: Residential ways.
> 30-45: Suburban arterials
> 45: Expressways (trunk) unless otherwise posted (rare, there may be some
> inaccurate NE2 trunks existing, but I know Salem Parkway and Bend Parkway
> are 45s)
> 50: ALL urban freeways except I 405 and I 5 near central Portland (which
> are variable 15-50)
> 55: Suburban freeways, almost all rural highways.
> 60: I5 in Salem (IIRC) and pretty close to nowhere else.
> 65: Extremely rural freeway.
> In any rate, maxspeed in Oregon can consider ODOT ORCA a valid source
> under Oregon's sunshine laws (which means, to the best of my understanding,
> every public way in Oregon should have a maxpseed based on the above or
> what is in ODOT ORCA.
> http://www.oregon.gov/ODOT/hwy/traffic-roadway/Pages/speed_zone_program.aspx
>  Anything outside the above chart probably should specifically tag the
> traffic signs involved, since 100% of speed limits on public roads are
> controlled by ODOT.
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