A MODEL FOR DESIGN OF PUBLIC TRANSPORT NETWORK WITH PREDEFINED ROUTE HEADWAYS

摘要

The presented article deals with the problem of planning public transport networks. The problem is solved by means of linear programming methods. Results got by solving the original mathematical models often require consequent corrections in order to put the results in practice. Problems may arise if we want to keep regular headways on a route (time intervals between the consecutive connections of the route). The headway can be calculated on the basis of the cycle time of the route and the number of the vehicles that are assigned to the route. The presented model differs in the fact that the model takes into account only feasible values of the headway on the route. Vehicles are allocated according to the feasible headways; their values are predetermined. The total number of the vehicles assigned to the routes forms the optimization criterion. The model is created for transport companies having a heterogeneous vehicle fleet. The heterogeneous vehicle fleet is the fleet consisting of different kinds of the vehicles (for example buses and trams). Moreover, individual vehicles of the same kind can differ in their capacity. The presented mathematical model takes into account both of these facts.