Which numbers in a vehicle phase are assigned to the through movements?

The correct answer indicates that even numbers are typically assigned to the through movements in a vehicle phase. This convention is widely recognized in traffic signal systems, where odd and even numbering schemes help distinguish between different types of movements at an intersection.

Assigning even numbers to through movements helps maintain consistency and clarity in the operation of traffic signals. Through movements are usually the primary and most common movements at intersections, which makes them easier to identify with a straightforward numbering scheme. This choice enhances the understanding of signal operations for technicians and drivers alike.

The approach of utilizing even numbers can also assist in programming traffic signals for various timing plans, making it easier to ensure that through movements receive appropriate signaling durations compared to turning movements, which are often designated with odd numbers. By following this established convention, traffic management becomes more efficient, as operators can swiftly identify phases and adjust plans accordingly.