From Disney Parks Blog:
When you enter Disney California Adventure park this summer, you’ll step back in time to Los Angeles of the 1920s and ‘30s on Buena Vista Street. One of the keys to creating a truly immersive environment like this is populating it with interesting and believable characters, so Walt Disney Parks and Resorts Creative Entertainment has been hard at work developing the unique personalities and show experiences that will bring the new entrance avenue to life.
Buena Vista Street is alive with optimism and opportunity. It’s a boulevard of dreams and dreamers… like the Citizens of Buena Vista Street. This cast of characters will interact with guests in this area of the park, creating impromptu laughs, smiles and memories wherever they go.
They will include a police officer, a bicycle rider, and a shopper looking for that great deal. This adds some character to the entrance and is very popular in other Disney theme parks as well.