| 31. | It has no traffic lights or stop signs in any direction.
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| 32. | Young people were hanging from street lamps and traffic lights.
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| 33. | Millions of commuters were stranded as traffic lights went out.
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| 34. | Once, a flash came to him at a traffic light.
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| 35. | Traffic lights stopped working, causing traffic jams in downtown Santiago.
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| 36. | Traffic lights across the city were not functioning, causing collisions.
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| 37. | Traffic lights do not give the same clear imperative everywhere.
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| 38. | Green can communicate safety to proceed, as in traffic lights.
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| 39. | Traffic lights stopped working, and police directed cars at intersections.
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| 40. | Traffic lights went black in several San Francisco Bay communities.
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