The required energy absorption modules had major impacts on the headshape design of locomotives and passenger rolling stock.
Due to the expensive equipment there are no full body crash tests in railway applications.
[1] Before the time of EN 15277 the head of a locomotive was simply part of the full body of the railway vehicle.
The EN 15227 has been made mandatory by the Technical Specifications for Interoperability (TSI) decisions in 2008 - the 2008/232/CE[2] for high-speed railway and 2008/57/EC[3] for conventional rail.
[5] However, the required "Crash Energy Management System" of US-origin can be integrated into the EN 15227 cabin resulting in a vehicle that can be shown to be compliant in both areas.