A person is travelling at 60mph at a 45mph speed limit road. The person sees a reduced speed limit sign (35mph) from 30ft away and starts reducing the speed. The reduced speed limit zone starts after 40ft of the reduced speed limit sign. a. What would be the deacceleration rate for the driver to successfully reduce his/her speed before entering the recued speed area. The driver is going in a downhill grade of 5% and the reaction time is 2.5 sec. b. Do you think it's a good design? State your reason.

A person is travelling at 60mph at a 45mph speed limit road. The person sees a reduced speed limit sign (35mph) from 30ft away and starts reducing the speed. The reduced speed limit zone starts after 40ft of the reduced speed limit sign. a. What would be the deacceleration rate for the driver to successfully reduce his/her speed before entering the recued speed area. The driver is going in a downhill grade of 5% and the reaction time is 2.5 sec. b. Do you think it's a good design? State your reason.