A simple work mode choice is estimated from data in a small urban area to determine the probabilities of individual travelers selecting various modes. The mode choice includes auto-drive alone (DL), auto-shared ride (SR) and Bus (B), and the utility functions are estimated asUDL = 2.2 - 0.2(Cost DL) - 0.03(travel time DL)USR = 0.8 - 0.2(cost SR) - 0.03(travel time SR)UB = - 0.2(cost B) - 0.01(travel time BWhere cost is in Rand and time in minutes. Between a residential area and an industrial complex, 4000 workers (generating vehicle based trips) depart for work during the peak hour. For all workers, the cost of driving an automobile is R 4.00 with travel time of 20 minutes and the bus fare is 50 cents with a travel time of 25 minutes. If the shared ride option always consists of two travelers sharing costs equally, how many workers will take each mode.