The number in each lane indicates 567 568 162 163 125 445 80 507 508 210 395 Every lane sees one of these, appropriately illuminated, at any given time The number in each lane indicates the average hourly traffic load, i.e., the number of vehicles per hour
In each diagram, circle the arrow(s) in the lane(s) that are allowed to make legal progress with green light(s). Do this in such a way that a sequence of [to be determined number] diagrams produces the minimum total cycle time of the traffic lights at this intersection.