1.   Governments have dragged their feet on approvals, costs have ballooned, bad weather has dogged construction.

2.   However, based on previous large-scale construction projects in Rhode Island, some are worried that government costs would balloon.

3.   Of course, light rail still has its troubles, such as in Seattle, where the cost ballooned even before the groundbreaking.

4.   Some skeptics express concern that the cost could balloon to many times that initial estimate, especially since some of the projects involve untested technology.

5.   Some say Swiss will have too big a fleet for its market and that its costs will balloon over time.