Application of new UIC Leaflet 421 methodology to new freight train compositions with up to four traction units in distributed traction/braking

Current version of UIC Leaflet 421 provides a (not mandatory) methodology based on statistical analysis to accept train compositions whose limits exceeds 2500t and 700m in braking position "G", for international traffic. This methodology does not consider explicitly trains with distributed traction/braking and their most relevant degraded modes. The paper...