Evidence that car drivers will use trams but not buses

(A US Transportation Research Board analysis {US Transportation Research Board TRB Report No. 1221) of 40 years of data of buses replacing rail, and latterly rail replacing buses (as in Houston), showed that light rail (trams) carried 40% more trips than a like for like bus service, and that the majority of this difference was car commuters switching to rail. Passenger behaviour is a stronger signal of travel preference than attitude surveys.