9f599409_o_Your_Website_and_Mobile_Apps__Description
[Parameter] polyline [2] Required [Description] 
Specifies the encoded polyline for the route segment coordinates. If the application or mapping service does not provide an encoded polyline or the encoded polyline is unknown, set polyline = -1 (for more details on encoded polylines click here).
Eco:Speed™ - Add Eco:Speed to Your Website and Mobile Apps