The Numbering of US Interstate Highways

13 Comments on The Numbering of US Interstate Highways

1. Of course, DC breaks its own rules:
   695 in DC doesn’t reconnect
   270 doesn’t reconnect
   Baltimore has 83 which doesn’t follow any of the rules.

   4

2. And don’t get me started on Philly. Where did 76 come from?

   4

3. I know the numbering system, but I’ve never heard of highways described as horizontal and vertical.

   8

4. As a Canadian who’s father was a truck driver he informed me of this when I started snow birding as a young man. Helped me when I would get lost.

   3

5. …here’s another good explanation…

   https://youtu.be/8Fn_30AD7Pk?si=HAYw0VkDo2wpCnYb

   …and a bonus for air travellers…

   https://youtu.be/jfOUVYQnuhw?si=YBtn9u0NwvpcC2l7

   5

6. The Pacific Coast Highway (PCH), also known as Highway 101 on its north end and Highway 1 to the south… Or you can call it SR1.

   But you can’t call it anything much if there’s a landslide,a mudslide, or a fire.

   5

7. Huh. Trying to figure out how Las Vegas managed to get LAS.

   Must have made threats to all the other “Las” cities. ((You know, being mobbish and all.))

   5

8. sns had a good link but this is better https://youtu.be/rNu8XDBSn10?si=eFvdYRAdGVrHkA6e

   5

9. What happened to Big Fur Hat?

   4

10. ^^^^^
    Burnt to a crisp.

    2

11. .
    How the states got their two letter abbreviations.
    .
    https://www.youtube.com/watch?v=dLECCmKnrys&ab_channel=TeamCoco

12. I knew some of this. Great post.

    1

13. The shortest interstate I’ve been on is a connector between, roughly Pleasanton, CA and whichever one is on the East Bay side. Maybe 10 miles in length. Then there is Interstate 19 which like an illegal immigrant returning to his birthplace, cuts off Interstate 10 northwest of Tucson and heads south to Nagales (Arizona and Sonora (??)) sister cities, or maybe quarrelling sister cities for all I know.

    1