Below is a map of the busy New York roads.


The circles with letters represent traffic lights and the lines are roads. Note that some traffic lights are represented by the same letter. One way of driving from traffic lights E to G can be described as E D D F G.

On a busy Monday morning, two taxi drivers drive the following routes:

Yellow : E A B A D B A G B G C B
Blue : H C B A C B C G F B C B
If both taxis leave at the same time and drive to each traffic light at the same pace, how many times do they reach the same traffic light at the same time?
Explain your rationale for the final answer that you submit.

They do not reach any traffic lights at the same time.
Two times
Five times
Six times​