When you create a new trip, you can choose which trip type it is. The trip type is used, among other things, in the generation of routes.
Hike
Used when you have neither car or anything else. Routing is done in pedestrian mode.
Car trip
Used when the majority of the trip will be run by car. Routing is done by the best executable road.
Bike trip
Used when the main means of transport is bicycle. Routing is done in bicycle mode.
Ski trip
Used when the main means of transport is skiing. Routing is done in pedestrian mode.
Boat trip
Used when the main means of transport is boat. Routing is done in pedestrian mode.
Long trip No longer in use
Used on longer trips, usually by plane. Routing is done in pedestrian mode.