5-1-1

5-1-1 is a transportation and traffic information telephone hotline in some regions of the United States and Canada. Travelers can dial 511, a three-digit telephone number, on landlines and most mobile phones. The number has also extended to be the default name of many state and provincial transportation department road conditions Web sites, such as Wisconsin's site.^[1] It is an example of an N11 code, part of the North American Numbering Plan.

5-1-1 services in the United States are organized by state or region. Some 5-1-1 services are limited to information for drivers regarding road conditions and traffic. Other services have a wider scope, also providing information on public transport, carpooling and other services.