Human Factors Guidelines for Road Systems: Third Edition (2025)

Chapter: 22 Changeable Message Signs

Previous Chapter: 21 Signing
Suggested Citation: "22 Changeable Message Signs." National Academies of Sciences, Engineering, and Medicine. 2025. Human Factors Guidelines for Road Systems: Third Edition. Washington, DC: The National Academies Press. doi: 10.17226/29158.
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Suggested Citation: "22 Changeable Message Signs." National Academies of Sciences, Engineering, and Medicine. 2025. Human Factors Guidelines for Road Systems: Third Edition. Washington, DC: The National Academies Press. doi: 10.17226/29158.
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Suggested Citation: "22 Changeable Message Signs." National Academies of Sciences, Engineering, and Medicine. 2025. Human Factors Guidelines for Road Systems: Third Edition. Washington, DC: The National Academies Press. doi: 10.17226/29158.
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Suggested Citation: "22 Changeable Message Signs." National Academies of Sciences, Engineering, and Medicine. 2025. Human Factors Guidelines for Road Systems: Third Edition. Washington, DC: The National Academies Press. doi: 10.17226/29158.
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Suggested Citation: "22 Changeable Message Signs." National Academies of Sciences, Engineering, and Medicine. 2025. Human Factors Guidelines for Road Systems: Third Edition. Washington, DC: The National Academies Press. doi: 10.17226/29158.
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Suggested Citation: "22 Changeable Message Signs." National Academies of Sciences, Engineering, and Medicine. 2025. Human Factors Guidelines for Road Systems: Third Edition. Washington, DC: The National Academies Press. doi: 10.17226/29158.
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Suggested Citation: "22 Changeable Message Signs." National Academies of Sciences, Engineering, and Medicine. 2025. Human Factors Guidelines for Road Systems: Third Edition. Washington, DC: The National Academies Press. doi: 10.17226/29158.
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Suggested Citation: "22 Changeable Message Signs." National Academies of Sciences, Engineering, and Medicine. 2025. Human Factors Guidelines for Road Systems: Third Edition. Washington, DC: The National Academies Press. doi: 10.17226/29158.
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Suggested Citation: "22 Changeable Message Signs." National Academies of Sciences, Engineering, and Medicine. 2025. Human Factors Guidelines for Road Systems: Third Edition. Washington, DC: The National Academies Press. doi: 10.17226/29158.
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Suggested Citation: "22 Changeable Message Signs." National Academies of Sciences, Engineering, and Medicine. 2025. Human Factors Guidelines for Road Systems: Third Edition. Washington, DC: The National Academies Press. doi: 10.17226/29158.
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Suggested Citation: "22 Changeable Message Signs." National Academies of Sciences, Engineering, and Medicine. 2025. Human Factors Guidelines for Road Systems: Third Edition. Washington, DC: The National Academies Press. doi: 10.17226/29158.
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Suggested Citation: "22 Changeable Message Signs." National Academies of Sciences, Engineering, and Medicine. 2025. Human Factors Guidelines for Road Systems: Third Edition. Washington, DC: The National Academies Press. doi: 10.17226/29158.
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Suggested Citation: "22 Changeable Message Signs." National Academies of Sciences, Engineering, and Medicine. 2025. Human Factors Guidelines for Road Systems: Third Edition. Washington, DC: The National Academies Press. doi: 10.17226/29158.
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Suggested Citation: "22 Changeable Message Signs." National Academies of Sciences, Engineering, and Medicine. 2025. Human Factors Guidelines for Road Systems: Third Edition. Washington, DC: The National Academies Press. doi: 10.17226/29158.
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Suggested Citation: "22 Changeable Message Signs." National Academies of Sciences, Engineering, and Medicine. 2025. Human Factors Guidelines for Road Systems: Third Edition. Washington, DC: The National Academies Press. doi: 10.17226/29158.
Page 275
Suggested Citation: "22 Changeable Message Signs." National Academies of Sciences, Engineering, and Medicine. 2025. Human Factors Guidelines for Road Systems: Third Edition. Washington, DC: The National Academies Press. doi: 10.17226/29158.
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Next Chapter: 23 Markings
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