The design flow rate, or the maximum flow that is expected to use the intersection. See the theory and concepts modules on peak hour volume, design flow rate, and PHF.

Any portion of a signal cycle in which a red indication is observed by all approaches.

The portion of an intersection leg that is used by traffic approaching the intersection.

The maximum number of vehicles that can reasonably be expected to pass over a given roadway or section of roadway, in one direction, during a given time period and under the prevailing roadway, traffi [..]

Identical to the intergreen interval.

Identical to the all-red interval.

The flow ratio of the critical lane group within a phase. The actual or design flow rate for the critical movement divided by the saturation flow rate for that movement.

The lane or movement for each phase, depending on how you choose to subdivide you intersection, that requires the most green time.

A volume, or combination of volumes, which produces the greatest utilization of capacity for the street or lane in question, given in terms of passenger car units per hour per lane or mixed vehicles p [..]

A complete sequence of signal indications. Each phase has been serviced and the cycle is beginning again.