What type of movements does split phasing serve?

• A. Three-way movements only
• B. All movements on one approach per phase
• C. Exclusive left turn movements only
• D. All movements at adjacent intersections

Answer: (B)

Split phasing is a traffic control strategy used at signalized intersections, where all movements from one approach are allowed to occur during a single signal phase. This means that vehicles can proceed in all directions on a given approach while opposing traffic movements are stopped. By doing so, split phasing effectively reduces potential conflicts between turning vehicles and oncoming traffic, enhancing safety and traffic flow for those specific movements.

In contrast, the other options do not accurately represent the purpose of split phasing. For example, split phasing does not limit traffic management to exclusive left turns or three-way movements, nor does it address all movements at adjacent intersections. It specifically focuses on one approach and allows for uninterrupted movement of all vehicles on that approach, making it a highly effective strategy in certain traffic conditions.