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Synchro 5.0, the LOS analysis software, also calculates Intersection Capacity Utilization (ICU) which provides additional insight as to how well an intersection is functioning and how much extra capacity is available to handle future growth, traffic fluctuation and incidents. The ICU calculation does not use existing signal timings or sign control.
A diagrammatic sign or diagrammatic guide sign is a type of guide sign that indicates destinations using a large, map-like illustration of the road layout. The term is most commonly associated with diagrammatic signs installed ahead of forks in controlled-access highways to indicate the destination of each lane.
Vienna Convention intersection sign (diamond-shaped) New Zealand intersection with priority sign. These signs warn of road crossings at crossroads, T-intersections, roundabouts, or Y-intersections. They may also indicate "hidden driveway" intersecting the road ahead. (Compare with bridges, overpasses, viaducts).
Some signs can be localized, such as No Parking, and some are found only in state and local jurisdictions, as they are based on state or local laws, such as New York City's "Don't Block the Box" signs. These signs are in the R series of signs in the MUTCD and typically in the R series in most state supplements or state MUTCDs.
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 ...
This file is in the public domain because it comes from the Manual on Uniform Traffic Control Devices, sign number W2-5, which states specifically on page I-1 that: Any traffic control device design or application provision contained in this Manual shall be considered to be in the public domain .
An uncontrolled intersection is a road intersection where no traffic lights, road markings or signs are used to indicate the right of way. They are found either in residential neighborhoods or in rural areas. While the intersection itself is unmarked, warning signs or lights may be present to alert drivers to it.
Warning signs are traffic signs that are used to warn road users about a potential danger. These signs are usually diamond in shape and, except for temporary traffic control signs, have black legends and borders on a yellow background. Work zone signs have orange backgrounds, and incident management signs have pink backgrounds.