The through phases are numbered in which direction?

Answer: B — Clockwise

The through phases of a traffic signal are numbered in a clockwise direction to maintain consistency and clarity across various traffic signal systems. This systematic approach helps technicians and engineers to easily understand and manage signal operations, especially when coordinating signals at intersections or along corridors. Numbering the through phases clockwise aligns with standard practices and ensures that individuals working with these signals have a common frame of reference. This is particularly useful for those involved in programming or troubleshooting signal controllers, as it allows for quick identification of the phases during maintenance or installation procedures. By following this convention, it reduces the likelihood of confusion or errors that could occur if numbering were done in a random or counterclockwise manner.