1. 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

2. 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.