TIL that 2-digit interstates ending with a 0 go east-west and with 5 go north to south. If it is 3-digits (495) it is an offspring of the original road (95). If the first of the 3-digit is odd, it goes through a city, if it is even it goes around a city.

http://en.wikipedia.org/wiki/Interstate_Highway_System



Submitted January 21, 2015 at 08:49PM by krixen http://www.reddit.com/r/todayilearned/comments/2t6dmy/til_that_2digit_interstates_ending_with_a_0_go/