xml → vehicle Relation

File in src/utils/xml	Includes file in src/utils/vehicle
SUMORouteHandler.h	SUMOVehicleParameter.h
SUMOVehicleParserHelper.cpp	SUMOVehicleParameter.h
SUMOVehicleParserHelper.h	SUMOVehicleParameter.h
SUMOVehicleParserHelper.h	SUMOVTypeParameter.h