Avoid U-Turns in requested HERE Maps route

Question

When requesting a multi-leg route via the HERE API (e.g. Point A to Point B via Point C), is it possible to prevent or restrict u-turns? I am trying to produce a map to be followed by a school bus, and u-turns are not allowed. However, I often find that the directions suggest to do a u-turn upon arrival at the intermediate points. I would like the bus to keep going straight after making its stop. Is this possible to do?

Answer 1

I'm not aware of the possibility to restrict this type of maneuver. Nevertheless, you can use truck routing in Here Location Platform for Enterprise, see the documentation here:

https://developer.here.com/documentation/download/routing_lbsp/6.2.32.0/Routing%20API%20v6.2.32.0%20Developer%27s%20Guide.pdf

It should retrieve much more adapted route for your use case and it might avoid u-turn.

Also, one final simple solution is to calculate route with alternative set to 3 (or make multiple call with other optimizations) and iterates through the different result in order to exclude routes that would include maneuver with a type associated to a u-turn