Changeable Message Sign Displays During Non-Incident, Non-Roadwork Periods (2008) / Chapter Skim
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Pages 38-43
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39 BACKGROUND AMBER alert is a notification program to help locate missing children believed to have been abducted. The Emergency Alert System (formerly known as the Emergency Broadcast System)
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alert information should be available on all stations anyway, that the participant does not listen to AM radio, or that the term local in the message was more informative to them. For the other descriptor alternatives, TUNE TO RADIO and TUNE TO LOCAL RADIO, the main reason given for not selecting them was that there was not a specific station number provided.
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41 It is important that AMBER alert messages are designed and displayed on CMSs uniformly across the state. In some state DOTs, there is one person who has the responsibility to coordinate the design and display of AMBER alert messages for the entire state.
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comprehend the messages while traveling at typical freeway speeds. Public Response The reported public response to AMBER alert messages is summarized in Figure 36.
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43 • We provide detailed vehicle information on half of our CMS displays and direct travelers to our HAR frequency on the others where more complex information and instructions are available (1 TMC)
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information when the AMBER alert is no longer in effect. In addition, there were concerns about the specific message design so that the information displayed on the CMSs does not exceed the reading and understanding capabilities of drivers.
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