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There's also I-595 between DC and Annapolis, which is signed as US-50 instead because there are too many x95s in the area.
by GFK_of_xmaspast 10y ago
There's also I-595 between DC and Annapolis, which is signed as US-50 instead because there are too many x95s in the area.
- Sanddancer 10y agoThere's a simpler explanation. It's a pre-existing route that was adopted by the federal highway system. US 50 is well known enough that resigning it would be more trouble than it was worth.
- GFK_of_xmaspast 10y agoInterstates don't usually spring out of thin air, they're often existing US Highways or state roads that get relabeled or upgraded to interstate standards and relabeled.
- amyjess 10y agoMany Interstates share numbering with US Routes. It's a way to keep around some US Routes that share some of their path with an Interstate but then diverge sharply in other areas without having to maintain two roads in parallel Head over to Google Maps and zoom in on some random Interstates; you'll see the dual numbering. A good example is I-10 and Route 90 in southeast Texas. Everything between roughly Columbus and Vinton (including the whole Houston area), I-10 and Route 90 are the same road, but they go their separate ways on both sides. Or for a north-south example, I-35E and Route 77 in the Dallas area; they're joined between Denton and Waxahachie.