In the above problem, suppose that there is an initial queue in NB that with jam density of n vehicles at the start of the NB

green, and no vehicles arrive to join the queue during the green time window. What is the maximum n such that the last vehicle

in the queue can cross the stop bar just before NB yellow starts (we consider the vehicle crossed the stop bar once its rear

crossed it)? [Remark: draw the wave lines and vehicle trajectories will help you solve the problem]