1. A system, comprising a computer in a vehicle, the computer comprising a processor and a memory, wherein the computer is configured to: receive input specifying a route start point and a route end point; retrieve data relating to a vehicle type for possible use on the route; retrieve data including at least one attribute of each of one or more possible route waypoints, the at least one attribute relating to at least parking availability for the vehicle type; and determine a route between the start point and the end point at least in part by applying a route parameter to the attribute; wherein applying the route parameter includes excluding at least one waypoint from consideration for the route.