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5 pictures show (1) a traffic signal suspended on a horizontal pole above the street.  Next to the signal is a camera, which looks like a long tube about a foot long and 4 inches high, aiming toward the traffic that is facing the signal. (2) two women and a baby in a stroller waiting at the corner while a child pushes the pedestrian button; the walk sign is on to cross the street beside them, and traffic is moving in the street in front of them.  In the street to their left, a driver has pulled forward and is looking to his left, as if he plans to turn right on the red light.  (3) A crosswalk across 7-8 lanes in a complex intersection, we see detectable warning and the back of a pedestrian button suspended on a stub pole on the sidewalk, and a woman to cross.  Traffic from both directions on the street beside her is turning left while everyone else waits.  (4) a pedestrian pushbutton with a sign explaining what the pedestrian signals mean. (5) A man wearing jeans and black jacket holds a long cane in his left hand and stands on the sidewalk next to a pole. On the pole is a blue box about 4 by 4 inches on the top and 10 inches high.  The man has his right hand on top of the box (the box is about as high as his waist).

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Self-Study Guide:
Crossing at Modern Traffic Signals

Dona Sauerburger, Gene Bourquin, Bonnie Dodson-Burk