What is a primary purpose of coordinating signals along a corridor?

What is a primary purpose of coordinating signals along a corridor?

• A. To improve progression of vehicles through signals along a corridor.
• B. To maximize the number of signals with green simultaneously.
• C. To decrease pedestrian crossing times by ignoring them.
• D. To increase intersection width.

Answer: (A)

Coordinating signals along a corridor aims to create a smooth green progression for vehicles as they move from one intersection to the next. By setting cycle lengths and offsets so a group of vehicles travels at a common speed and reaches successive signals when they’re green, you reduce stops and delays—often described as a "green wave." This improves travel time, increases corridor capacity, and promotes steadier traffic flow. It’s not about having all signals green at once, nor about ignoring pedestrians or widening intersections; those are separate considerations. The core idea is to enable vehicles to progress through multiple signals with minimal stopping.

Coordinating signals along a corridor aims to create a smooth green progression for vehicles as they move from one intersection to the next. By setting cycle lengths and offsets so a group of vehicles travels at a common speed and reaches successive signals when they’re green, you reduce stops and delays—often described as a "green wave." This improves travel time, increases corridor capacity, and promotes steadier traffic flow. It’s not about having all signals green at once, nor about ignoring pedestrians or widening intersections; those are separate considerations. The core idea is to enable vehicles to progress through multiple signals with minimal stopping.