Contains two papers that deal with signalized street networks and two that are reviews or syntheses of traffic flow studies and freeway simulation models. Lieberman and Wick present a new algorithm designed to minimize the length of the transition period while still providing acceptable services along all signal approaches in the system. Davies, Grecco, and Heathington describe a simulation model that reproduces in the laboratory the traffic flow on any moderate-sized signalized street network. Fifteen freeway traffic simulation models were compared against a baseline of eight features regarded by Hsu and Munjal as desirable and independent of specific simulation purpose. A comparison table for the model is presented. Weiner summarizes results of study by several researchers into distributions of speed and other traffic characteristics.
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