A comparison is made between the rolling horizon strategy of traffic signal control at an isolated intersection and the strategy of switching the signal when a queue vanishes. It is shown that the former strategy has some undesirable consequences.

S. L. Albin has described extensive simulations of queue behavior for a system with a single server and an arrival process that is a superposition of n renewal processes. The simulations show, among other things, that as n increases for a fixed traffic intensity \rho, the queue behavior...

1. Introduction -- 2. Limit properties for a » 1 -- 3. Descriptive properties of the evolution -- 4. The overflow distribution -- 5. Joint distributions -- 6. A diffusion equation -- 7. Transient properties -- 8. Equilibrium properties of the diffusion equation -- 9. Equivalent random method --...