● The interstates were originally designed to be able to run military equipment from coast to coast on flatbed trailers at sustained speeds of 75 mph.
● Did you know that if you're on interstate 5, you have 5% of the U.S. left to the west of you? If you are on interstate 95, you have 95% left to the west of you?
● If you are on interstate 20, you have 20% of the U.S. left to the south of you? If you are on interstate 90, you have 90% left to the south of you?
● ALL [or mostly all] interstates going east or west have EVEN numbers. ALL interstates going north or south have ODD numbers.
● If a city bypass has an even number it loops [called a LOOP] back to the same interstate. i.e. I-440 ends back up on I-40.
● If a city bypass has an odd number it does NOT loop [called a SPUR] back to the same interstate. i.e. I-540 does not come back to I-40.
Highway know-how from truckers.