The design of freeway entrance ramps and lane-drops using semi-Markov processes. Paper prepared for the 55th Annual Meeting of the Transportation Research Board TRB, Washington, D.C., January 1976.

The properties of a continuous time semi-Markov process are outlined, and the usefulness of that process for modelling highway merging maneuvers is discussed. Solution of the general model by Laplace transforms and flow-graph techniques is illustrated.