A kilometer marker is a sign or post placed along a road or trail that indicates the distance in kilometers from a specific starting point. These markers help travelers gauge how far they have traveled and how much distance remains to their destination. They are commonly found on highways, hiking trails, and in urban areas. Kilometer markers are often used in conjunction with other navigation tools, such as maps and GPS devices. They can also serve as reference points for emergency services, allowing them to locate incidents more easily. In some regions, these markers may be part of a larger system of distance measurement, such as mile markers in countries that use the imperial system.