According to the WIKI and some discussions back in April ( http://lists.openstreetmap.org/pipermail/talk-us/2009-April/000976.html) and again in September ( http://lists.openstreetmap.org/pipermail/talk-us/2009-September/001597.html), the US Interstate system was going to be moved into a new schema where each direction of each interstate would be split at the state border to avoid hitting API 0.6's 1000-member hard-cap on relationships.
Last night, user NE2 "cleaned up" the interstate system by merging all of the states with 2 relations per interstate back into 1 relation with direction-based roles. I've already requested a roll-back on the area I was working on, but I wanted to check if we still have a consensus on splitting each interstate into separate directions at the state line. Chris Hunter DiverCTH
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