Lettre U

[size=150]USA[/size]The U.S. Department of Transportation (DOT) Research and Innovative Technology Administration (RITA) is building this pilot website with a view to improving the collaborative capabilities offered to transportation researchers and other related stakeholders both inside and outside DOT http://www.transportationresearch.gov/Pages/index.aspx
RITA http://groups.google.com/group/transport-innovators/browse_thread/thread/38449ed299751470/aa37e825dc86cbeb?hl=fr#aa37e825dc86cbeb

Unité multiple
http://www.lrpresse.fr/trains/viewtopic.php?t=28132 --> Des engins moteurs en unité multiple (UM) participent à la traction d'un train en étant conduits par le même conducteur.
Unité multiple ou train tracté par locomotive http://forums.quebectrain.com/viewtopic.php?t=4900&start=0
Unité multiple sur les diesels SNCB http://groups.google.com/group/fido.belg.trains/browse_thread/thread/750be68df2082ec3?hl=fr