King, the founder of the British advocacy group 20's Plenty for Us, has successfully promoted low-speed zones in cities across the U.K. He argues that area-wide regulations, rather than piecemeal devices like speed bumps and school zones, have the best chance of promoting restrained driving, or "tootling" as he calls it, with the aim of reducing traffic fatalities.
King's work in the in the U.K. informed New York's recently introduced anti-speeding campaign, Ian Parker writes:
"New York City's Department of Transportation has announced that it will introduce an experimental twenty-m.p.h. neighborhood, somewhere in the city, before the end of next year."