Tunnel's cost may fool us all A professor at Oxford University in England has done a compelling series of studies trying to get at why big public-works projects such as bridges, tunnels and light-rail systems almost always turn out to be far more costly than estimated. "It cannot be explained by error," sums up one of his papers, matter-of-factly. "It is best explained by strategic misrepresentation — that is, lying." The professor, Bent Flyvbjerg (pronounced flew-byair), has become a fl