Introducing the concept of alternative intersections with three-phase traffic signals
TRANSPORTATION LETTERS-THE INTERNATIONAL JOURNAL OF TRANSPORTATION RESEARCH(2024)
摘要
At intersections where traffic demand is above capacity, reducing the number of signal phases may help operational performance. Alternative intersections may help achieve the reduction; however, retrofits to alternatives with two-phase signals may be impactful and unpopular. Our study evaluates five alternative signalized intersections with three critical phases, namely partial median U-turn intersection (MUT), partial continuous-flow intersection (CFI), a combination of MUT and CFI (MUT/CFI combo), reverse reduced conflict intersection (reverse RCI), and thru-cut. Three-phase designs may provide better capacity than conventional intersections with fewer impacts than two-phase intersections and, therefore, may be more palatable to stakeholders. A wide range of simulation scenarios were tested to evaluate the performance of the intersections using VISSIM and the Surrogate Safety Assessment Model. Based on the results, all three-phase designs outperformed the conventional design in terms of traffic operation. The partial CFI and MUT/CFI combo yielded the fewest conflicts among the designs evaluated.
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关键词
Alternative designs,three-phase intersections,thru-cut,median U-turn,continuous flow intersection,MUT/CFI combo,reverse RCI,PTV VISSIM
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