Assessment of Safety and Operation Performances of CFIs and DDIs in Utah
Alternative intersection and interchange designs, such as the Diverging Diamond Interchange (DDI) and the Continuous Flow Intersection (CFI), have garnered significant attention among transportation agencies, researchers and practitioners over the past 15 years, due to their ability to improve operations and safety of transportation systems. The Utah Department of Transportation (UDOT) is recognized as a national leader in the design and implementation of innovative intersections and interchanges. Currently there is not a lot of information on field-based performance measures of these designs. As it has been 16 years since the first CFI was implemented, followed by many more CFIs and DDIs, UDOT's databases contain a lot of useful data regarding operations and safety of these designs. The accelerated deployment of DDIs and CFIs necessitates the needs for more in-depth assessment of their benefits and impacts. The objective of this study is to perform safety and operational assessment of CFIs and DDIs in Utah. It will develop Utah-specific Safety Performance Functions (SPFs) and Crash Modification Factors (CMFs) for these designs. The study will also assess the operational performance of CFIs and DDIs, and explore ways in which operations can be improved (geometry, control, signalization).
Language
- English
Project
- Status: Active
- Funding: $152644
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Contract Numbers:
69A3552348308
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Sponsor Organizations:
Office of the Assistant Secretary for Research and Technology
University Transportation Centers Program
Department of Transportation
Washington, DC United States 20590 -
Managing Organizations:
Center for Transformative Infrastructure Preservation and Sustainability
North Dakota State University
Fargo, ND United States 58108 -
Project Managers:
Tolliver, Denver
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Performing Organizations:
University of Wyoming, Laramie
1000 E University Avenue, Department 3295
Laramie, WY United States 82071 -
Principal Investigators:
Zlatkovic, Milan
- Start Date: 20240607
- Expected Completion Date: 20260606
- Actual Completion Date: 0
- USDOT Program: University Transportation Centers Program
- Source Data: CTIPS-014
Subject/Index Terms
- TRT Terms: Highway design; Highway operations; Highway safety; Interchanges and intersections
- Geographic Terms: Utah
- Subject Areas: Design; Operations and Traffic Management; Safety and Human Factors; Transportation (General);
Filing Info
- Accession Number: 01922095
- Record Type: Research project
- Source Agency: Center for Transformative Infrastructure Preservation and Sustainability
- Contract Numbers: 69A3552348308
- Files: UTC, RIP
- Created Date: Jun 20 2024 4:23PM