Traffic signals play a vital role in managing transportation, but have you ever thought about how that management works or how intersections are designed? 

In this episode of Taken with Transportation, we talk with SFMTA Senior Traffic Engineer Bryant Woo, Traffic Signal Electrician Dennis Verhalen and Transit Signal Supervisors Ferdinand Lumbad and John Affolter about how San Francisco intersections, from the most complex to the simple, function and about maintaining traffic signals. They help us understand how the work they do keeps the city moving.