Thames Transit was a bus and coach company which operated in the Oxford area. As well as running a number of local services, they also ran a regular service to London (via the M40 motorway) called the Oxford Tube. It now carries approximately fifteen million passengers a year using just under 200 vehicles. The company is now part Stagecoach Group, and has been since July 1997, upon acquisition it was merged with Stagecoach South Midlands but was demerged in 2004 into Stagecoach Oxfordshire. Until then, the company traded under the Thames Transit name, under the ownership of Transit Holdings International.