The Luas system as now constructed raises serious questions about further extensions. Some critics would see Luas as a QBC on rails, at a very high price of €800 million. A proper cost benefit analysis needs to be undertaken for future transport projects. We should double the costs and halve the benefits for all future cost benefit analysis to see whether a project stacks up for investment and whether it is worth doing. This has been our experience with the major infrastructural projects in this city; when one considers Luas one sees that the benefits are not those we expected and the costs have almost trebled.