June 25th, 2017: Zero Milestone

[BigV]

Originally Posted by Clodfobble

Around here they are by mile marker, except we have lots of places where there is more than one exit per mile, in which case they become exit 223A, 223B, 223C...

Likewise here. Furthermore, the mileage is measured from the state line at the southern border for North South freeways and from the eastern border on east west freeways. The A B C etc, sub-divisions are in alphabetical order traveling north or traveling east, and in reverse alphabetical order when traveling south or traveling west.

Makes sense on the interstate, since they're federal highways.