Samenvatting
This manual presents the basic principles that govern the design and usage of traffic control devices, thereby considering the basic requirements which should be met for the effectiveness of the devices.
This manual presents the basic principles that govern the design and usage of traffic control devices, thereby considering the basic requirements which should be met for the effectiveness of the devices.
Washington, U.S. Department of Transportation, Federal Highway Administration (FHWA), 1971, XIX+377 p., fig.
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