TravelMode(value)
Travel modes which can be used by vehicles.
These should be a subset of the Google Maps Platform Routes Preferred API travel modes, see: https://developers.google.com/maps/documentation/routes_preferred/reference/rest/Shared.Types/RouteTravelMode.
Values:
TRAVEL_MODE_UNSPECIFIED (0):
Unspecified travel mode, equivalent to DRIVING
.
DRIVING (1):
Travel mode corresponding to driving
directions (car, ...).
WALKING (2):
Travel mode corresponding to walking
directions.