Relying on TSS data, strategies to improve traffic flow at a single intersection might include a pre-timed plan where a traffic signal’s phase and timing is based on January/February 2012 time of day, for example. An alternative to the pretimed
plan is a traffic-actuated plan where a traffic signal’s phase and timing adjust based on the number of vehicles waiting to pass through an intersection, the length of the line of vehicles, or the speed of vehicles passing through the intersection. Traffic actuated plans may also include limitations that allow each lane, at some point, to pass through the intersection, while
still favoring the direction and lane where traffic is heaviest.