A special train to test tracks and signals equipment is under the Paris Gare de Lyon sheds, the test coaches are visible with the special Infrastructure livery (grey and yellow), first one is the Mauzin 211 to test tracks geometry, second one is only to have brake weight in this short train and third one is the IES 171 for signal tests. Rare picture with diesel locomotive at Paris Gare de Lyon station. There is also diesel locomotive on other side of the train to have revert capability.