The Velim test center is a railway rolling stock testing facility at Cerhenice, close to the town of Kolín in the Central Bohemian Region of the Czech Republic. It has become one of the main testing locations for new types of rolling stock designed for use in Europe, and has been a fully accredited European test centre since March 1995.
The most notable feature is the Velim railway test circuit, consisting of two large standard gauge railway track ovals designed for continuous running of new rail vehicles.
The centre is owned by the Railway Research Institute, a subsidiary of the national railway operator, České dráhy.
Wikipedia https://en.wikipedia.org/wiki/Velim_railway_test_circuit
Address (Unnamed Road), 28911, Czech Republic
Coordinates 50°6'13.209" N 15°4'49.935" E