To ask the Scottish Executive what the estimated levels of road and rail traffic crossing the Firth of Forth will be (a) 30, (b) 60, (c) 90 and (d) 120 years hence, given the proposed 120-year minimum lifespan of the new crossing. There are no projectionsof traffic over 30, 60, 90 or 120 years as these fall far beyond the limits overwhich any reasonable es...