All Lessons for Source

Source: Travel Time Messaging on Dynamic Message Signs – Chicago, IL; Houston, TX, Nashville, TN, and Portland, OR

Develop a user-oriented system for displaying travel time messages on dynamic messages signs. (May, 2005)
Four American Cities' experiences with Travel Time Messaging on Dynamic Message Signs.

Optimize travel time messaging operations by improving the way in which data is collected, analyzed, and displayed. (May, 2005)
Four American Cities' experiences with Travel Time Messaging on Dynamic Message Signs.