Update intervals for guidance strategies used in variable message signs have to be long due to limitations of
detectors and display format of broadcasting guidance information. A guidance strategy is introduced based on the traffic
state instead of travel time. A traffic state feedback guidance strategy is obtained by utilizing relative stability of traffic state.
A hybrid strategy considering travel time and traffic state is proposed as a solution of conflict between time-varying demand
and long intervals. Simulation results show that the traffic state feedback strategy is able to meet the practical requirement
both in the stability and accuracy under long update intervals, and the hybrid strategy further improves the accuracy.