Between the French stops of Lorraine and Champagne-Ardennes, trains reach an average speed of 279.4 km/h (167.66 km in 36 minutes) according to the last official Railway Gazette International World Speed Survey study in 2005. While this figure is almost half the speed of the fastest train speed ever – 574.8 km/h by a modified TGV V150 in 2007 – it represents a realistic, affordable, environmentally sound and safe top speed.