Thill, Jean-Claude; Rogova, Galina; Yan, Jun - In: Research in Transportation Economics 8 (2004) 1, pp. 571-603
In spite of a number of before-and-after evaluation studies of ITS field operational tests and other deployments that have substantiated the favorable payoff of investments in ITS technology, ITS benefits assessment is not a straightforward matter and continues to pose significant challenges....