Abstract
Route studies in California take into consideration three major factors 1) The effects that the alternate will have on the communities through or around which it may pass 2) the degree to which the alternate will fulfill existing and future traffic demands and 3) the initial cost of the alternate, including both construction an right-of-way. On the Century Freeway studies, cost factors seemed to favor the southerly alternates and traffic benefits appeared to favor the northerly alternates.