If traffic speed is a problem in your area, the two main ways you might tackle it are to convince the local authority to create 20mph zones and to engineer the road so that cars drive more slowly. Often the two work in tandem.
You might want to consider campaigning for a Home Zone. A much more complicated procedure, setting up a Home Zone is a separate guide.
To slow down traffic:
The photo above shows children giving a clear message: 20's plenty!
Campaign for Better Transport Charitable Trust is a charity (1101929) and a company limited by guarantee (4943428)