Occasional Frontier contributor Stuart Donovan has a great blog about light rail and its limitations.
When you gather all this evidence together (as well some other factors that I have not had time to discuss – such as choke point geometry and density) I have to conclude that light rail is not the solution to Auckland’s transport problems. Nonetheless, light rail does have some undoubted advantages in terms of ride quality and place-making, both of which stem from the fact that it runs on fixed tracks.