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    <copyright>Copyright © 2026. National Academy of Sciences. All rights reserved.</copyright>
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    <managingEditor>tris-trb@nas.edu (Bill McLeod)</managingEditor>
    <webMaster>tris-trb@nas.edu (Bill McLeod)</webMaster>
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      <title>Field Evaluation of All-Way Stop Control Intersection Capacity</title>
      <link>https://rip.trb.org/View/2221850</link>
      <description><![CDATA[All-way stop control (AWSC) is an important type of traffic control at intersections. Using this type of control, all intersection approaches are controlled by stop signs. The fact that vehicles on all intersection approaches must stop before entering the intersection is behind the safety benefits associated with this type of traffic control. However, this traffic control may have negative impact on the maximum number of vehicles entering the intersection from all approaches, i.e., intersection capacity. Estimating intersection capacity is very important for the selection of the appropriate traffic control given prevalent or predicted traffic conditions at the intersection. For AWSC intersections, not only the total traffic demand using the intersection is important, but also the demand on each given approach as all approaches have the same right-of-way priority. Therefore, knowing approach capacity is very important in assessing the suitability of this particular traffic control at a specific intersection site. 
This project involves an empirical investigation into the capacity of All-Way Stop-Controlled (AWSC) intersections using a study site in the city of Bozeman, Montana. The data are captured using video records of intersection operations while applying strict protocols in processing the data the individual vehicle level. This level of detail is expected to reveal many important insights into intersection capacity and the important variables that re thought to affect intersection capacity.  
]]></description>
      <pubDate>Thu, 27 Jul 2023 16:54:53 GMT</pubDate>
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      <title>Operational Applications of Signalized Offset T-Intersections</title>
      <link>https://rip.trb.org/View/1723550</link>
      <description><![CDATA[North Carolina Department of Transportation (NCDOT) maintains a significant number of T intersections with developable land occupying the vacant fourth leg. When a need for a fourth leg is established, NCDOT must determine the optimal location of the leg. Common options include adding the leg to the existing intersection as well as moving the leg up or downstream of the existing intersection to create an offset-T configuration. 
\This report first documented the established literature and knowledge regarding the operational and safety impacts of the offset T-intersection versus the 4-leg intersection. Then, it presented results from a microsimulation-based operational study over five development scenarios, two demand to capacity ratios, and nine intersection geometric designs, which resulted in 90 combinations of simulation scenarios. Queue length and delay were employed as measurements of effectiveness. Based on the simulation effort and associated measures, this research provided practice-ready guidelines to NCDOT on the selection of the optimal intersection geometry for each specific development project. In general, this research recommended the L-R offset T-intersection for new developments given its significant benefits in terms of reducing delay, particularly delay to the major street movements. 
]]></description>
      <pubDate>Thu, 23 Jul 2020 13:07:55 GMT</pubDate>
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