I found that the A axis is much busier than the B, especially around the cuba pedestrian mall, acting as a very public space, while the A and B converged at the waterfront (as did the physical paths).
I also found that during lunch time was a peak flow time, with the difference between A and B at maximum. At night, the A flow was lower but the B flow did not change as significantly, remaining at a 'low hum' day and night.
(on the graph, colours represent different times, fill or cross points the sites A or B)
And of course, this post couldn't have been possible without: