DESIGN THE INFRASTRUCTURE TOGETHER WITH THE TIMETABLE
TO ENSURE THAT IT WILL MEET ALL GOALS
JOINT INFRASTRUCTURE AND SERVICE PLANNING
Rail operations are the result of a complex interaction of infrastructure and signaling, rolling stock and timetable. This interaction is further complicated by a number of human factors and other unpredictable phenomena and stochastic disturbances.
This complexity, combined with the high costs of infrastructure and its low flexibility, forces planners to design the system carefully to limit the expenses by at-the-same-time offering the required performances and allowing a further incremental improvement in lather phases. These three objectives appear as a challenge for planners, who are asked to define network improvement plans that (a) can enter into service in the shortest possible time to anticipate the economic return of the investment and (b) have a reasonable cost, but (c) can be further developed without dropping the investments of the previous stages.
A joint development of timetable and infrastructure allows selecting the set of improvements required to effectively operate the expected services avoiding all unnecessary expenses.
In order to offer the highest accuracy, we use the “Planning loop” approach, which allows quickly defining timetable drafts and infrastructure improvements and evaluating their effect using network-wide microscopic simulation.
The result is an incremental network and timetable development plan in which every choice is motivated, explained and tested to ensure that it meets the initial requirements at best.