The silver Alstom Citadis trams, manufactured in La Rochelle, France, reach a top speed of 70 km/h on off-street sections, but travel at a slower speed on-street where conflicts with other vehicles and pedestrians can occur. The 26 initial Red Line '3000' Class trams were long Citadis 301 configurations with a capacity of 256. The 14 Green Line '4000 Class' trams, each long Citadis 401 configurations, have a capacity of 358 including two wheelchairs. Starting in 2007, all the Red line trams were upgraded to by inserting two more articulated sections, with the last one converted by June 2008. Both configurations of tramcars are fully compatible with both the Red and the Green Lines.