Line planning
As line planning is defined as the line determination of transport services. It is used in public transport , air transport and shipping .
definition
According to Werner Weigand, line planning in public transport is understood as “(...) the development of a public, clocked, demand-oriented transport service operated in line transport for a region to be delimited. The aim of the planning is to design an optimal transport offer according to the defined objectives. "
Position in the offer design
Line planning is usually the second step in the design of the offer after network planning . After the route network has been determined, the number and design of the lines are determined in this step. In further steps, the timetable , the vehicle schedule and the duty roster are created based on this. As a rule, it is only carried out at longer intervals, while the subsequent steps are carried out much more frequently.
aims
The goals considered in the route planning are on the one hand operational and on the other hand passenger-oriented. On the one hand, the company tries to keep the expenses for the transport company as low as possible, on the other hand it tries to maximize the benefits for the passenger . In this way, transfer flows and the direct driver share can be taken into account. Attention can be paid to the even line load and the travel time.
Allocation of passenger flows
The individual traffic flows are usually not known in the planning. Therefore, they need to be forecast. This usually takes place via the optimal travel time or the optimal transfer route.
Procedure
One method of line planning is the baseline method , in which the network of lines is composed of baselines. These consist of all combinations of two edges of the line network graph that enter a node . These represent the traffic flows passing through the node . From all of the possibilities resulting from this, a line network is formed through mathematical optimization that complies with the boundary conditions (e.g. capacities of the traffic routes ) and best fulfills the target function (e.g. maximizing direct drivers ).
Individual evidence
- ↑ Werner Weigard: "Production planning" p. 254 in Dietmar Lübke (Ed.) Handbook Das System Bahn.
- ^ Matthias Bär "System technology for rail and public transport 3" p. 2 TU Dresden, July 22, 2011
- ↑ a b Werner Weigard: "Production planning" p. 256 in Dietmar Lübke (Ed.) Handbook Das System Bahn.
- ↑ H. Sonntag: “A heuristic method for the design of demand-oriented lines in local public transport” in Mathematical Methods of Operations Research, Vol. 2, 1979