Show the cycle length and efficiency for each of the alternating, double alternating, and simultaneous progression schemes that may be used for this corridor. Which one would you recommend to use? Assume the cycle length of the simultaneous progress is 100 seconds.

a) Alternating - Cycle Length: 120 seconds, Efficiency: 85%
b) Double Alternating - Cycle Length: 140 seconds, Efficiency: 90%
c) Simultaneous - Cycle Length: 100 seconds, Efficiency: 80%
d) Alternating - Cycle Length: 100 seconds, Efficiency: 80%