Living at the intersection of rich and poor in Bay Area

Carmen Preciado has always been able to identify the precise spot along Middlefield Road that marks the end of her world and the beginning of another.

“When I go to the other side, it’s just like: ‘Oh, this is a rich people area,’” said Preciado, a 31-year-old single mother and life-long Redwood City resident. “You can see the difference.”