Clarification of terms "longitudinal", "lateral" necessary

Describe the problem

Terms like 'longitudinal'/'lateral' need to be clarified in detail at every place it is mentioned in the UML/User guide. Often a concrete coordinate system is not specified. Conditions/actions might differ between simulation tools if a clear definition is missing. E.g. clarify what means speed prescribed via a LongitudinalAction once we follow either a route or a trajectory (see side effects with RoutingAction, FollowTrajectoryAction etc)