A wear assembly for protecting the digging edge of a bucket which includes a wear member having a lock-receiving hole in one leg and an upstanding rib along the other leg. A route search unit searches for a route from a departure point to a destination point from the road network data stored in the database. The technique provides both virtual path shaping and controllability of underlying virtual channel connections with an improved fairness performance amongst all the aggregating virtual channel connections. A sequence of state symbols of a first type, a second type, and a third type is identified and associated with a distinct enveloping event pattern.