You have been asked to design a simultaneous traffic signal system for six intersections on a suburban arterial. The distances between consecutive intersections are:
Intersection A to Intersection B—3800 ft
Intersection B to Intersection C—4000 ft
Intersection C to Intersection D—3900 ft
Intersection D to Intersection E—3850 ft
Intersection E to Intersection F—3950 ft
Suitable cycle lengths for the intersections are
Intersection A—60 sec
Intersection B—55 sec
Intersection C—65 sec
Intersection D—60 sec
Intersection E—55 sec
Intersection F—60 sec
If an appropriate progression speed for the arterial is 45 mi/h, what cycle length would you use? Give a reason for your choice.