List of UIC norms and ERRI projects relatives to Longitudinal Dynamics UIC 421 : Composition and Braking rules for international brake trains ERRI B126-1, B177 RP1 to RP6 Problems of braking and dynamics for trains until 700 meters length ERRI B177-1 RP1 to RP2 and B177-5 RP1 : risk of derailment for train brakes in Regime P and 700 meters length UIC norms relatives to drawgears and buffers UIC 526-1 : buffers for wagons (105 mm) UIC 526-3 : buffers for wagons (130 and 150 mm) UIC 520 : drawgear