Modeled Traffic Congestion Sophisticated models can simulate the interaction of estimated demand and available supply at a regional scale. The Triangle Regional Model comprises both the Raleigh urbanized area and the Durham-Chapel Hill urbanized area. For the purposes of this Existing Conditions Summary, current congestion levels are derived from the Triangle Regional Model 2010 Base Year Model and are symbolized in the map below based on daily volume-to-capacity ratios. 2010 is the base year for the adopted Triangle Regional Model and as such is used to simulate existing conditions across the Triangle. The model represents the roadway network and traffic volumes as they were in 2010 and does not necessarily reflect the impact of intersections and railroad crossings on traffic congestion. Actual congestion near these locations may be greater than what is shown in the travel demand model. Modeled traffic congestion provides systems-level insight into overall congestion issues and can indicate corridors that warrant higher levels of study and analysis. It should be noted that given the extensive growth within the study area between 2010 and 2017, existing congestion levels exceed the modeled 2010 conditions in many locations; however, 2010 is the latest model data currently available from CAMPO.
Chapter 2: Existing Conditions| page 2 - 20
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