State and local government agencies and private companies disseminate real-time traffic info. to help travelers decide whether to use alternative, less congested routes. Legislation enacted in 2005 required the U.S. Dept. of Transportation (DoT) to establish the Real-Time System Management Information Program (RTSMIP), in order to provide states the capability to monitor traffic and travel conditions on major highways and share that info. This report addresses, among other things: (1) how the public and private sectors disseminate real-time traffic info. to the public; (2) actions DoT has taken to establish the RTSMIP; and (3) experts¿ views on the need for a nationwide RTSMIP and its potential characteristics. Charts and tables.