[2] The CC 7100 class were the first SNCF high-speed locomotives in which all the axles were motorized, i.e. with powered bogies rather a rigid frame.

From the outset it was apparent that bogie locomotives represented the future and so only a third of the anticipated 2D2s were built, in favour of the CC 7100.

These experiments provided valuable test data for the SNCF to develop increasingly more rapid regular services, including the 200 kilometres per hour (124 mph) Mistral of 1967, and ultimately the TGV.

[2] CC 7121 broke the rail speed record when it achieved 243 kilometres per hour (151 mph) on the PLM mainline between Dijon and Beaune on 21 February 1954.

[2] Although the rail speed record has since 1990 been repeatedly broken by high-speed trainsets such as the French TGV and the German InterCityExperimental trains, BB 9004 and CC 7107 retained the locomotive speed record for over 50 years until it was broken on 2 September 2006 by a Siemens Taurus locomotive, ÖBB No 1216 050, which attained 357 kilometres per hour (222 mph) hauling a single dynamometer car on the Nuremberg–Ingolstadt high-speed railway in Germany.