Type Testing and Homologation of Railway Vehicles, Systems and Components
Type testing and homologation is where a vehicle design is proven against the applicable TSI (for example LOC&PAS, Commission Regulation (EU) No 1302/2014), national rules and the project specification before an authorisation is issued. The exam probes your ability to select tests, interpret limits and map evidence to the authorisation route.
What has to be proven
- Running behaviour to EN 14363: stability, curve negotiation and ride comfort; the test plan must cover the maximum speed and the worst track sections.
- Structural strength to EN 12663, bogie frames to EN 13749, crashworthiness to EN 15227, fire to EN 45545, noise to EN ISO 3095.
- Braking, PRM access and CCS functions are separate subsystems with their own evidence.
The route
A NoBo issues the EC type-examination or verification certificate; a DeBo may cover specific parameters; an ISA assesses the safety case. The ERA or NSA vehicle authorisation under Implementing Regulation (EU) 2018/545 defines the area of use. A type authorisation covers a series, but each vehicle still needs its conformity-to-type check.
Worked example
A freight wagon approved at 22.5 t axle load is fitted with stiffer primary springs and a new friction damper to raise speed to 120 km/h. The supplier argues the only change is a component. Reasoning: suspension stiffness and damping directly control hunting and curving behaviour, so this change affects the running safety parameter; EN 14363 on-track tests are required at the new maximum speed, with stability assessment and curve tests. The existing certificate cannot simply be extended.
Traps
Confusing NoBo and NSA roles; assuming TSI compliance removes route compatibility checks; testing only at maximum speed instead of the critical speed; treating a type certificate as covering unbounded variants.