Federal Highway Administration Office of Operations
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The Federal Highway Administration's Office of Operations activities involving travel times on Dynamic Message Signs (DMS) encourage and assist states and metropolitan areas in posting travel time messages. In May 2005 case studies were done on four cities (Chicago, Houston, Nashville and Portland, Oregon) that currently post travel time messages via DMS. The four case studies document the planning, deployment, operations, public outreach, and lessons learned of each cities travel time messaging on DMS system.

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Federal Highway Administration
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Travel Time Messaging on Dynamic Message Signs – Chicago, IL; Houston, TX, Nashville, TN, and Portland, OR
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