Last fall saw the opening of New York City’s first 20-mph “slow zone” in the Bronx, complete with speed bumps and extra signage. Soon, Inwood will be home to the first slow zone in Manhattan. And Tuesday, Mayor Bloomberg announced that thirteen new slow zones will be added to different neighborhoods, with more to be selected from the pool of over one hundred streets nominated by applicants. While slow zones are a good idea, their success is dependent in large part on how they are enforced. When asked by Streetsblog about how the NYPD measures the success of its speed enforcement, Transportation Chief James Tuller said that they “deploy enforcement resources to locations based on data collected by DOT”, which, you may notice, is the answer to a totally different question. People are hit and killed by drivers that break traffic laws, and while adding slow zones can help immensely, it is, in essence, another rule that can be broken. Or even worse, an ineffective inconvenience.