This SDK is a directions plugin for mapbox-gl-js using the Mapbox Directions API. It provides a way to quickly add UI to display driving, cycling, or walking directions on the map. The Mapbox Directions API is powered by the OSRM routing engine and open data from the OpenStreetMap project. Some features include; calculate optimal driving, walking, and cycling routes, produce turn-by-turn instructions and produce routes with up to 25 coordinates anywhere on earth. Mapbox is an open source mapping platform for developers.