keepright ( http://keepright.ipax.at ) is the single most important tool in the bag of open street map tricks, and pretty much the only reason I'm starting to believe that OSM may one day have a modest shot at being useful for routing (the lack of house numbers rules out a top-notch experience, IMHO). And now it's available for the US too. Woohoo!
The starting point of the keepright checking algorithm was in Philadelphia, so that's what popping up for first time keepright USA users.
If you ever needed proof that OSM is currently NOT ready for general routing use, look no further.
What A Mess...
US Interstates are often the first ways to be corrected (largest ! for $), but somehow Philadelphia didn't receive its share of TLC. It has interstates going straight through the city center, either on elevated structures over the local streets or in these huge ditches with local streets crossing above, but pretty much all of them have a junction as if they were intersection. You know: speed down on I-76 at 75 mph, next take a sharp turn right onto 21st St. Fun, fun, fun.
It's obviously no easy to have so many over- and underground highways, but you'd think that a city this size has at least some OSM fanatics to clean thing up?
Anyway, I've fixed up a large section of the downtown I-76 intersections, but some are too obscure to get a decent insight (like the one this post is linking to.) Let's get to work!
(And, please, whenever something is fixed, mark it as such on keepright.)