Review of the platform height concept of Kasseler Verkehrs-Gesellschaft

Optimised accessibility with a heterogeneous vehicle fleet

On behalf of the KVG, the STUVA examined the feasibility of a concept developed by the KVG to improve boarding conditions on the Kassel trams and drew up recommendations for modification. At Kasseler Verkehrs-Gesellschaft (KVG), different vehicle types with differing parameters stop at shared platforms. In the case of KVG, these are not only three different tram vehicle types with different widths, but also with different carriage floor heights in some cases. The long-term goal is to achieve standardised boarding conditions in the trams. Until suitable replacement vehicles are procured, the question therefore arises as to which adjustments to the infrastructure are strategically and economically sensible for this transitional phase and with a view to the target state.

The first step was to determine the clearance requirements of the trams in a straight line; the height of the carriage floor and the gap dimensions between vehicles and platforms change dynamically. For example, wheel flange and track wear, wheelset lateral elasticity as well as primary and secondary suspension have an influence on the access conditions that should not be neglected. The results are based on calculations in accordance with TRStrab clearance as well as empirical surveys, which provided valuable information on problem areas.

Overall, it was found that the KVG's existing platform height concept was basically realisable. However, the detailed review by the STUVA revealed new ‘problem areas’. Although these can be dealt with technically or operationally, they entail greater technical and economic expense. A revised strategic concept was therefore developed in consultation with the responsible KVG working group.

Based on the results, KVG will initially focus on a temporary and relatively inexpensive partial raising of the platforms at the doors with access to the multi-purpose areas (wheelchair spaces). When new vehicles are procured, the expansion targets for platform heights and track centre distance are specified to the vehicle manufacturers in order to be able to realise homogeneous boarding conditions in the future. If there is a homogeneous vehicle fleet in terms of carriage floor height and width, the height of the platforms should be fully adapted to the new vehicles in order to create optimum boarding conditions.