110Route Calculation and RecalculationiGO primo calculates the route based on your preferences:Route planning methods:• : Gives a quick route if you can travel at or near the speed limit onall roads. Usually the best selection for fast and normal cars.• : Gives a route that has the smallest total distance of all possibleroutes. It can be practical for slow vehicles.• : Gives a quick but fuel efficient route based on the fuelconsumption data given in Green Routing settings (page 88). Travel cost andCO2 emission calculations are estimations only. They cannot take elevations,curves and traffic conditions into account.• : Results in a route with fewer turns and no difficult maneuvers.With this option, you can make iGO primo to take, for example, the freewayinstead of a series of smaller roads or streets.Vehicle types:• Maneuver restrictions and directional constraints are taken into account whenplanning a route.• Roads are used only if access for cars is allowed.• Private roads and resident-only roads are used only if they are inevitable toreach the destination.• Walkways are excluded from routes.• Neither maneuver restrictions nor directional constraints are taken into accountwhen planning a route.• Roads are used only if access for pedestrians is allowed.• Controlled-access roads are excluded from routes.• A private road is used only if the destination is there.• Speed limits are not used in route calculation and an average walking speed isused when calculating the estimated time of arrival.
