Traveler information systems have been developed to distribute real-time traffic, roadway conditions, weather and other related traveler information to drivers through vehicles, PDAs, kiosks and websites.  Providing this information, travelers can make route and timing decisions before or during their trip.   On July 21, 2000, the Federal Communications Commission assigned 511 as the nationwide traveler information telephone number and granted responsibility for it to government transportation agencies. Since that time, several statewide and regional 511 systems have been implemented throughout the United States.