like former San Jose Mayor, Sam Liccardo, have and continue to initiate changes that improve the situation...go to his website, or click on the link.
Now, back to the issue of Neighborhood Watch and signage...the program is a good one, and signage can help, but the core efforts that make it work are Education and Active Coordination by the Neighborhood residents...just relying on signage won't cut it.
Link: https://samliccardo.com