What is it?

• Weather-related Traveler Information Dissemination Systems transmit information about current or forecasted weather to travelers and highway agencies.
• These systems include cellular or wireless phones, Highway Advisory Radio (HAR), variable Message Signs (VMS), and the Internet. These systems can operate individually or as part of a larger system, such as a Road Weather Information System (RWIS).
• Most weather-related traveler information systems have weather forecasting or detection capabilities. Others can initiate road maintenance or traffic control.

• RWIS are the most widely used traveler information systems.
• Different road users need different types of information at various times. For example, truckers want weather information before their trip whereas recreational travelers want this information en route.

• Travelers who are better informed of current or projected road weather conditions are more prepared to respond to potential hazards or route changes.
• Highway personnel can make informed decisions about how and when to deploy road maintenance crews in adverse weather conditions.

• RWIS: Capital Cost: 25k, Operation and Maintenance: 0.4-2.5k per year
• VMS: Capital Cost: 10-50k, Operation and Maintenance: 1.9-4.1k per year
• HAR: Capital Cost: 16-32k, Operation and Maintenance: 0.6-1k per year
• Informational Kiosk: Capital Cost: 9.55-50k, Operation and Maintenance: 0.955-5k per year

• More detailed forecasts are needed so that travelers can obtain customized forecast information for specific routes.
• The various needs of different road users must be identified in order to deliver relevant weather information.
• DOTs need a more efficient process for interpreting and transmitting weather data.

Where is it Implemented?

Weather-related traveler information systems operate across the United States. More systems are found in the Midwest where weather has a year-round impact on road conditions.

Author: Lauren Smith