National Academies Press: OpenBook

Guide for Intersection Control Evaluation (2024)

Chapter: Acronyms and Abbreviations

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Page 67
Suggested Citation:"Acronyms and Abbreviations." National Academies of Sciences, Engineering, and Medicine. 2024. Guide for Intersection Control Evaluation. Washington, DC: The National Academies Press. doi: 10.17226/27509.
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Page 67

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67   Acronyms and Abbreviations AADT annual average daily traffic ADA Americans with Disabilities Act BIPOC Black, indigenous, and people of color CADD computer-aided design and drafting CAP-X Capacity Analysis for Planning of Junctions CFI continuous flow intersection CFL contraflow left CMF crash modification factor DDI diverging diamond interchange DLT displaced left turn DOT department of transportation GIS geographic information system HCM Highway Capacity Manual HIFLD Homeland Infrastructure Foundation-Level Data HSM Highway Safety Manual ICE intersection control evaluation ILAC indirect left at crossover LCCET Life-Cycle Cost Estimation Tool MUT median U-turn MUTCD Manual on Uniform Traffic Control Devices parclo partial cloverleaf PPEAG Planning and Preliminary Engineering Applications Guide RCI reduced-conflict intersection RCUT restricted crossing U-turn ROW right-of-way SaFID safest feasible intersection design SPF safety performance function SPICE Safety Performance for Intersection Control Evaluation SPUI single-point urban interchange SSAM Surrogate Safety Assessment Model SSI Safe Systems for Intersections

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Intersection control evaluation (ICE) is fundamentally a process that provides the framework, steps, and tools and offers decision support for assessing trade-offs between different types of intersection forms and controls.

NCHRP Research Report 1087: Guide for Intersection Control Evaluation, from TRB's National Cooperative Highway Research Program, defines intersection form as the physical layout of the intersection and intersection control as the traffic control device used to govern movements for vehicles, pedestrians, and bicyclists. For example, in the case of a modern roundabout, “form” refers to the circular shape, while “control” refers to yield control at entry.

Supplemental to the report are NCHRP Web-Only Document 377: Background and Development of a Guide for Intersection Control Evaluation and nine Excel-based spreadsheet tools developed in conjunction with the guide to help practitioners organize and document an ICE evaluation and perform specific analyses: Intersection Control Evaluation (ICE) Process Tool, Capacity Analysis for Planning of Junctions (CAP-X) Tool, Planning and Preliminary Engineering Applications Guide Tool for Intersection Control Evaluation (PPEAG ICE Tool), Equity Assessment Tool, Design Flags Calculator Tool, SSI Score Calculator Tool—Intersection, SSI Score Calculator Tool—Interchange, Safety Performance for Intersection Control Evaluation (SPICE), and Life-Cycle Cost Estimating Tool (LCCET).

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