There's lots of policy, perception, and personal actions that impact the community outcome that you can do. It's a community problem, so it needs a community solution.
Lets say you lived on a street that was just perfect for street racing, bonus it's a cut through between two other busy streets. However, all the neighbors would also like it to be a safe place to walk, bike, and cross the street. Do you just say: I don't speed or race on the street. I cannot impact what others do. Guess I better move, or learn to dodge cars better. Or, do you explore options to reduce the amount of traffic that cuts through, speeds, and races down the street? Maybe you work with the neighbors on options. Perhaps speed bumps, roundabouts, stop signs, one way streets, extra curves, cross walk lights, or other traffic shifting items. Each of those also has different impacts on the people that follow the rules too. Maybe your neighbor really wants speed bumps but they drive you nuts and you would prefer roundabouts.
That's what community spread is like. You can do your part to not spread it. But, if you cannot convince your community to all do their part too, it's not going matter.