There is considerable debate concerning the relative merits of different transportation modes. As previously mentioned, there is little debate concerning the value of basic highway rehabilitation, and much of the . highway system is now due for major maintenance and repair, as indicated in Federal Highway Administration Conditions and Performance Reports (FHWA 2006). Table 5 summarizes results of that report, indicating that current annual highway and transit investments are approximately $28 billion below what is needed for basic maintenance and operational improvements, without highway expansion. It makes little sense to expand the highway system if current funding is inadequate for.
