If there is no way to calculate a route that aligns with all specified options and truck parameters and avoids all applicable restrictions, your request will still result in a route.
In such a case, the response contains notices with possible reasons for the relevant
section of a
route. Notices about violated vehicle restrictions contain details about the restrictions that were violated. This gives users a hint to either change their waypoints or truck parameters to be able to get to the desired destination.
For exhaustive details on notices, see the Routing API specification.