This paper presents the basic model that estimates route choice and departure time distributions at the commuter rush hour. The choice of route and departure time is based on the trade-off between travel time and schedule delay. The utility function consists of the estimated travel time, schedule delay, lateness in arrival at work. The estimated travel time includes the safety marginw ith uncertain travel performancef rom day to day. This model applies to the urban road networks with multiple trip origins and distinations by means of the new dynamic traffic assignment. The model is used to perform simulation experimentsa, nd to analyze the impacts of values of the disutility parameters.