The primary mission of government is to protect the public. With Vision Zero, New York City is laying the foundation for ending traffic deaths and injuries on the streets. Starting from police crash reports and citizen input, the city identified and prioritized dangerous zones and intersections. It designed and deployed practical solutions and then measured and reported their impact. By combining education (e.g. marketing campaigns and town halls), enforcement (e.g. via the NYC police department and speed cameras) and infrastructure (e.g. bike lanes and speed bumps), by encouraging collaboration across agencies and with the private sector, and by involving local communities and their elected representatives before, during and after, the City managed to deploy effective and impactful solutions, within a budget and a short timeframe. The Vision Zero case study will show that traffic casualties can be avoided effectively and that this approach can be replicated in other urban environments.