While I appreciate the sentiment behind an article like this one, and while the author tries really hard to be a good road geek, I have to point out a couple of things:
- I-279 through Pittsburgh, once truncated at the Point, will still fit the definition of a three-digit interstate with an even first digit, which is to say that it will both start and end at other interstate highways (in this case, I-79 to the north, and I-376 to the south).
- I-376, once fully extended to the airport, will actually fit the definition of a three-digit interstate with an odd first digit even better than it now does, because it will start at one interstate highway (I-76) but will no longer end at another one. Of course, all bets will be off if plans to further extend it back to I-76 on the west side or to I-80 are ever realized.
Note that even numbers at the beginning usually indicate loops or bypasses, and that odd numbers usually indicate spurs into a city, but the real definition is based on the start and end points.
Sorry. It’s been a rough week. That’s all I’ve got tonight…