Mile markers are signs placed along roads and highways that indicate the distance traveled from a specific starting point. They help drivers gauge their location and estimate how far they have left to travel. Typically, mile markers are numbered sequentially, with each number representing one mile. These markers are essential for navigation and can assist emergency services in locating incidents. In addition to distance, some mile markers may also provide information about nearby exits or points of interest, enhancing the travel experience for drivers and passengers alike.