ACCORDING TO TRIMET PIN HEADS THERE ARE NO VISUAL BARRIERS

Invisible pedestrians are a nightmare for bus drivers, who live in fear of running over people they can't see.
Three pedestrians were killed in 63 accidents with SEPTA buses in 2012, the most in recent history.
Now, bus drivers are urging SEPTA to reposition outside rearview mirrors, contending they create a blind spot that endangers pedestrians, especially during left turns.
The drivers have an ally in David Sale of Vancouver, Wash., whose daughter Danielle, 22, was killed by a left-turning bus in Portland, Ore., in 2010.

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"We don't have to put drivers in that position," Sale said last week. The driver who killed his daughter and another woman and injured three others was fired, and "she got a life sentence the day she hit my daughter," Sale said. "She'll have to live with that every day for the rest of her life."

Read the story: Bus drivers urge SEPTA to reposition mirrors to protect pedestrians - Philly.com