Why are there mile markers on every interstate?
Mile markers indicate the distance from where the Interstate route entered the state in which you are traveling. Per Transportation Department standards, the counting always begins at the state line in the south (for north-south routes) and in the west (for east-west routes), so mile-marker numbers always get larger as you travel east or north. Some mile markers are simply a small green-and-white sign with a number, or with the word “mile” below the number. In some places, larger mile markers also indicate the Interstate number and the direction of travel. In some states, exit numbers are linked to the closest mile marker, so that exit 25 will be close to mile 25. If you are at mile marker 20, you know that exit 25 is five miles away, and you can tell the kids there are five minutes to a bathroom break. Other states simply number the exits consecutively without regard to the mile marker. Bing: Interstate Driving Conditions The mile markers are important for emergency vehicles and road
