› › Development Of Performance Matrices For Evaluating Innovative Intersections And Interchanges

Development of Performance Matrices for Evaluating Innovative Intersections and Interchanges

Author : Milan Zlatkovic

Publisher :

Page : 70 pages

File Size : 46,82 MB

Release : 2019

Category : Roads

ISBN :

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Book Description

Innovative intersections and interchanges have proliferated in the State of Utah over the past several years. Continuous flow intersections and diverging diamond interchanges seem to offer improved traffic performance and safety due to their innovative designs. However, there are no clearly defined guidelines or methodologies for monitoring and measuring their performance. Yet, they have a broad impact on operations, safety, access, transit, land use, economic development, and pedestrian and non-motorized traffic. Due to these numerous and overlapping variables, there is a need to develop a standard methodology to further evaluate innovative designs with regards to different performance measures. The goal of this research is to develop a matrix of performance measures, which can be applied in practice to effectively evaluate innovative designs in terms of operations, safety, access, and multimodal accommodations. The study develops and tests an Excel-based tool for evaluation and comparison of different conventional and innovative designs. The tool is based on the existing methodologies and those currently being developed, and they provide analyses of these designs for different performance measures, such as operational, safety, transit and non-motorized user performance, access, and user costs. It can be used for planning, designing, and monitoring performance of innovative designs.



Operational and Safety Performance Assessment of Innovative Intersection and Interchange Designs in a Connected Vehicle Environment

Author : Mutasem Alzoubaidi

Publisher :

Page : 139 pages

File Size : 48,78 MB

Release : 2022

Category : Intelligent transportation systems

ISBN :

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Book Description

Innovative intersections and interchange designs is one strategy known to enhance the operational and safety performance of our roads. Innovative designs specifically lead to an improved signal progression and result in reduced travel times, delays, crash severities and frequencies. Connected Vehicle (CV) technology is another strategy that has enabled dozens of Intelligent Transportation Systems (ITS) applications with the potential to bring major safety, mobility and environmental benefits. Many studies have focused on exploring each strategy when implemented solely. Therefore, one of the goals of this dissertation is studying the impacts and benefits of the combined implementation of the two strategies, while the other lies within developing a new innovative interchange design called the Continuous Green-T Partial Cloverleaf A (CGT-parclo A) and exploring its operational and safety aspects. A microsimulation approach was followed to achieve these goals.The results show that the combined implementation of CVs and innovative intersections has reduced travel times, and delays by nearly 65.3%, and 29.2%, respectively. Additionally, the total number of conflicts, rear-end and lane change conflicts dropped by nearly 23.8%, 23.6% and 24.4%, respectively at full Continuous Flow Intersections and 100% MPRThe CGT-parclo A exhibited superior operational performance to a multitude of interchange designs in most tested cases. The CGT-parclo A reduced travel times, and delays as high as 55.7%, and 69.8%, respectively, compared to the parclo A and parclo progressA. The CGT-parclo A is the best form of parclo A interchanges in terms of reducing the likelihoods, severities and frequencies of crashes.



Guide for Intersection Control Evaluation

Author : Bastian J. Schroeder

Publisher :

Page : 0 pages

File Size : 18,72 MB

Release : 2024

Category : Roads

ISBN : 9780309709361

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Book Description

"A variety of intersection control evaluation processes and metrics are used by highway agencies for evaluating intersection geometry and control alternatives and identifying an optimal geometric and control solution for an intersection. These processes usually address safety, operational, multimodal, environmental, right-of-way, and cost impacts and other considerations. However, there is no widely accepted procedure or guide for evaluating new intersections or modifications to an intersection. There is a need to develop a guide that incorporates rational processes, objective performance metrics, and appropriate tools to provide a consistent and objective intersection control evaluation. Such a guide will help highway agency personnel in making decisions regarding intersection type and control, and implementing safer, more balanced, and more cost-effective solutions. The objective of this research was to develop a guide for intersection (including interchanges) control evaluation. The guide is accompanied by associated processes and tools to facilitate implementation." -- publisher's website



Intersection and Interchange Design

Author : National Research Council (U.S.). Transportation Research Board

Publisher :

Page : 184 pages

File Size : 26,58 MB

Release : 1993

Category : Technology & Engineering

ISBN :

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Roundabouts

Author : Lee August Rodegerdts

Publisher : Transportation Research Board

Page : 407 pages

File Size : 45,98 MB

Release : 2010

Category : Technology & Engineering

ISBN : 0309155118

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Book Description

TRB's National Cooperative Highway Research Program (NCHRP) Report 672: Roundabouts: An Informational Guide - Second Edition explores the planning, design, construction, maintenance, and operation of roundabouts. The report also addresses issues that may be useful in helping to explain the trade-offs associated with roundabouts. This report updates the U.S. Federal Highway Administration's Roundabouts: An Informational Guide, based on experience gained in the United States since that guide was published in 2000.





Updated Methods for Traffic Impact Analysis, Including Evaluation of Innovative Intersection Designs

Author : Gerald Bollinger

Publisher :

Page : pages

File Size : 32,78 MB

Release : 2017-05-15

Category :

ISBN : 9781622604593

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Book Description

In 1992, an Applicant's Guide and a Reviewer's Guide to Traffic Impact Analyses to standardize the methodologies for conducting traffic impact analyses (TIAs) in Indiana were developed for the Indiana Department of Transportation (INDOT). The methodologies were meant to help streamline the process of preparing and reviewing TIAs. The methodology is applicable for other transportation and government entities as well. Because 20 years have passed since the publication of the guides, INDOT wished to evaluate how effective the guides have been, determine what in the guides has worked well, revise parts of the guides that have not worked well, and add improvements and changes that have occurred since the guides' publication. Brief explanations of innovative intersection alternatives such as roundabouts, median U-turns (MUT), restricted-crossing U-turns (RCUT), displaced left-turns (DLT), and quadrant roadways (QR) are provided to increase awareness of these possible designs. Some of the innovative designs were compared against a two-way stop-controlled intersection and a conventional signalized intersection for varying volumes on minor street approaches. The median U-turn design seemed to perform better at higher, more balanced flows whereas the roundabout performed better for unbalanced flows. At times, a development affects roads in more than one jurisdiction. Ideas are presented that may facilitate the inclusion of all affected parties early in the development process to improve communication, address all possible effects of the development and better satisfy all affected parties.







Traffic Control Systems Handbook

Author :

Publisher :

Page : 670 pages

File Size : 16,68 MB

Release : 1976

Category : Electronic traffic controls

ISBN :

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Book Description

This handbook, which was developed in recognition of the need for the compilation and dissemination of information on advanced traffic control systems, presents the basic principles for the planning, design, and implementation of such systems for urban streets and freeways. The presentation concept and organization of this handbook is developed from the viewpoint of systems engineering. Traffic control studies are described, and traffic control and surveillance concepts are reviewed. Hardware components are outlined, and computer concepts, and communication concepts are stated. Local and central controllers are described, as well as display, television and driver information systems. Available systems technology and candidate system definition, evaluation and implementation are also covered. The management of traffic control systems is discussed.