Please check the Waypoint Parameter "passThrough":
http://developer.here.com/rest-apis/documentation/routing/topics/resource-param-type-waypoint.html
Question
When generating a route using the HERE API, I would like to force the route to travel down a certain side of the street. For example, there may be a pickup point on the westbound side of the 2-way street. A U-turn is not possible, thus, I need to ensure the route travels westbound through the waypoint and not eastbound. Is this possible?
Solution
Please check the Waypoint Parameter "passThrough":
http://developer.here.com/rest-apis/documentation/routing/topics/resource-param-type-waypoint.html