The purpose of this paper is to update and assess the continued development and application of freeway simulation models in the 1980s. Several activities were undertaken to meet this objective. First, literature searches were undertaken utilizing the University of California Institute for Transportation Studies library and the author's personal library. Second, the identified references were classified by freeway simulation model family and placed in a historical perspective. The references were then carefully studied to identify and assess new developments and applications. Finally, identified authors were contacted to determine omissions and to confirm the current status of their freeway-modeling efforts.