Are operating cost assumptions correct? Does the tram offer the best return on investment [capital and operating]?
Previous TfL reports quote better cost/benefit ratios for trolleybuses over trams. The cost assumptions for a trolleybus solution are not justified and give an over estimate of cost. A comparable system including equal segregation and passenger capacity would cost no more than 50% that of a tram solution. Operating costs are inherently lower than trams because of the removed rail maintenance costs. It would appear that what is an absolute necessity for reliable tram operation [for instance complete removal of all utilities under the road along the entire route length] have been included in other modal options where they are by no means essential. It should be noted that power supply systems are common to both modes and can be inherited. What can be learnt from other tram schemes such as those recently developed in Croydon and Nottingham? Largely segregated light railways achieving high speeds along radial routes from city centres [Croydon and Manchester] have very little in common with
