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  2. Road signs in the United States - Wikipedia

    en.wikipedia.org/wiki/Road_signs_in_the_United...

    11th edition of the MUTCD, published December 2023. In the United States, road signs are, for the most part, standardized by federal regulations, most notably in the Manual on Uniform Traffic Control Devices (MUTCD) and its companion volume the Standard Highway Signs (SHS).

  3. Manual on Uniform Traffic Control Devices - Wikipedia

    en.wikipedia.org/wiki/Manual_on_Uniform_Traffic...

    The Manual on Uniform Traffic Control Devices for Streets and Highways (usually referred to as the Manual on Uniform Traffic Control Devices, abbreviated MUTCD) is a document issued by the Federal Highway Administration (FHWA) of the United States Department of Transportation (USDOT) to specify the standards by which traffic signs, road surface markings, and signals are designed, installed ...

  4. Pavement condition index - Wikipedia

    en.wikipedia.org/wiki/Pavement_Condition_Index

    The pavement condition index (PCI) is a numerical index between 0 and 100, which is used to indicate the general condition of a pavement section.The PCI is widely used in transportation civil engineering [1] and asset management, and many municipalities use it to measure the performance of their road infrastructure and their levels of service. [2]

  5. Route shield pavement marking - Wikipedia

    en.wikipedia.org/wiki/Route_shield_pavement_marking

    Route shield pavement markings for Interstate Highways 30 and 35E at the Dallas Horseshoe.. A route shield pavement marking (also called an advance pavement marking [1] or pavement marking shield [2]) is a road surface marking that depicts a route shield and functions as either a road traffic safety measure or a mitigation against street sign theft.

  6. Road surface marking - Wikipedia

    en.wikipedia.org/wiki/Road_surface_marking

    Chevron, sign that forms a complete line which is not included in the meaning of line marking or cross marking, to indicate an area of the road surface that is not a vehicle traffic lane. Symbol marking, mark that contain certain meanings to express warnings, orders and prohibitions to complement or confirm the intent conveyed by traffic signs ...

  7. International roughness index - Wikipedia

    en.wikipedia.org/wiki/International_roughness_index

    Roughness progression for a road in Texas, US. Blue dots show the times of maintenance. The international roughness index (IRI) is the roughness index most commonly obtained from measured longitudinal road profiles. It is calculated using a quarter-car vehicle math model, whose response is accumulated to yield a roughness index with units of ...

  8. Hilton Head’s dark roads and pedestrians are deadly combo ...

    www.aol.com/hilton-head-dark-roads-pedestrians...

    Since the start of 2018, there have been nine pedestrian or cyclist deaths reported on Hilton Head. Many took place near or after sunset.

  9. Interstate Highway standards - Wikipedia

    en.wikipedia.org/wiki/Interstate_Highway_standards

    In places with higher truck traffic, over 250 directional design hour volume, wider shoulders should be considered. Pavement sloping: On straight sections of the highway, the roadway is to have a cross slope of at least 1.5%, and preferably 2% to ensure proper drainage, with up to 2.5% in areas of heavy rainfall. The cross slope of both the ...