The U.S. Department of Transportation (USDOT) and its partners from all levels of government recognize the need for a National Address Database (NAD). Accurate and up-to-date addresses are critical to transportation safety and are a vital part of Next Generation 9-1-1. They are also essential for a broad range of government services, including mail delivery, permitting, and school siting.
Based on a minimum content approach that was a key recommendation from the NAD Summit, a schema as developed as part of the NAD pilot. To date, USDOT has received address data from 22 state partners and has transformed it into the NAD schema. An initial release of the NAD is now available as a file geodatabase. It can be downloaded here.