How do mileage marks work on us interstates?

Mileage marks on U.S. interstates indicate the distance to the next exit or the distance from a designated starting point, usually a state line or a major city. Each mile is typically marked with a green sign displaying the mile number, allowing drivers to gauge their progress along the highway. Additionally, exit signs often show the distance to the next exit, helping drivers plan their stops. These markers are crucial for navigation and emergency response.