Control-Type Selection at Isolated Intersections Based on Control Delay under Various Demand Levels

Lee, Han; Li, Jan-Mou; Urbanik, Thomas

doi:10.3141/2071-13

Cited by 13 publications

(14 citation statements)

References 3 publications

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“…na = not applicable. Peak-hour entering volume 500 vph major approach and 210 vph minor approach (and 300 vph major approach and 300 vph minor approach) based on average delay or average queue length (Marek et al [23]) Examples of volumes based on control delay determined using Highway Capacity Software with consideration of percent left turns (Han et al [24]) Major and minor are vph/approach. NR = not recommended project did.…”

Section: Recommendationsmentioning

confidence: 99%

Developing and Implementing Manual on Uniform Traffic Control Devices Criteria for Selecting Traffic Control for Unsignalized Intersections

Hawkins

Fitzpatrick

Brewer

2019

Transportation Research Record: Journal of the Transportation R

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The 2009 United States Manual on Uniform Traffic Control Devices (MUTCD) includes guidance for the use of various types of traffic control at unsignalized intersections. Despite changes and advances in traffic engineering in recent decades, the MUTCD content related to selection of traffic control in Part 2B has seen only minor changes since 1971. The types of unsignalized traffic control addressed in the current research included no control, yield control, two-way stop control, and all-way stop control. The research team developed recommendations using information available from reviews of existing literature, policies, guidelines, and findings from an economic analysis along with the engineering judgment of the research team and panel. The researchers then developed recommended language for the next edition of the MUTCD for unsignalized intersections. This includes consideration of high-speed (rural) and low-speed (urban) conditions along with the number of legs at the intersection. Because the number of expected crashes at an intersection is a function of the number of legs, the decision on appropriate traffic control should also be sensitive to the number of legs present. The proposed language includes introductory general considerations, discusses alternatives to changing right-of-way control, and steps through the various forms of unsignalized control from least restrictive to most restrictive, beginning with no control and concluding with all-way stop control.

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Section: Recommendationsmentioning

confidence: 99%

Developing and Implementing Manual on Uniform Traffic Control Devices Criteria for Selecting Traffic Control for Unsignalized Intersections

Hawkins

Fitzpatrick

Brewer

2019

Transportation Research Record: Journal of the Transportation R

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“…Twoway stopcontrolled (TWSC) intersections are one of the most common forms of atgrade roadway junctions in the world (1). These intersections are typically located where a minor road intersects or joins a major roadway, and stops signs are placed on the minor approaches.…”

Section: Toward a Capacity Analysis Procedures For Nonstandard Two-way Stop-controlled Intersectionsmentioning

confidence: 99%

Toward a Capacity Analysis Procedure for Nonstandard Two-Way Stop-Controlled Intersections

Bogdanović

Ruškić

Kulović

et al. 2013

Transportation Research Record: Journal of the Transportation R

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Two-way stop-controlled (TWSC) intersections are one of the most common forms of at-grade roadway junctions in the world. These intersections are typically located where a minor road intersects or joins a major roadway and stop signs are placed on the minor approaches. When the major roadway and the traffic that it carries go straight through the intersection, it is a standard TWSC intersection. In many places, however, the prevailing traffic and the major roadway do not continue straight through the intersection. In such cases, the major roadway bends at an angle at the intersection, and the stop signs on the minor streets are placed on adjacent legs of the intersection. These intersections are nonstandard TWSC intersections. Nonstandard TWSC intersections are found frequently in some countries and exist in most. These intersections are officially recognized in traffic codes and manuals in Europe, Australia, and the United States, yet the Highway Capacity Manual (HCM) TWSC procedure does not specifically handle these intersections. In fact, a literature review yielded no established procedure for the calculation of capacity at nonstandard TWSC intersections that would consider the specificities related to the layout of the approaching roadways and the characteristics of the traffic flow, such as the critical headway and the follow-up headway. This paper demonstrates the uniqueness of nonstandard TWSC intersections, reports analysis results from field data collected at several similar nonstandard TWSC T-intersections, identifies discrepancy in critical headway figures and level-of-service ratings that can result from the use of the HCM procedure for TWSC intersections, and calls for further research on the subject in other locales.

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“…Surprisingly, only limited efforts have been made to develop new junction design rules. [4] used the HCM 2010 methodologies [5] to distinguish between different junction types based on the major and minor street volumes. They generated a dataset with more than 6,000 scenarios of varying traffic flows for three main junction types.…”

Section: Introductionmentioning

confidence: 99%

An Approach for Determining Rules used to Select Viable Junction Design Alternatives Based on Multiple Objectives

Bezembinder¹,

Wismans²,

Berkum³

2018

Adv. sci. technol. eng. syst. j.

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Transport planners and engineers frequently face the challenge to determine the best design for a specific junction. Many road design manuals provide guidelines for the design and evaluation of different junction alternatives, however these mostly refer to specialized software in which the performances of design alternatives can be modelled. In the first stage of the design process, such assessments of many alternatives are undesirable due to time and budget constraints. There is a need for quick design rules which need limited input data. Although some of these rules exist, their usability is limited due to inconsistencies in rules and non-transparency in combination with objectives. In this paper, we present an approach by which consistent and transparent junction design rules can be determined. The resulting rules can be used to predict a set of viable junction design alternatives for the first stage of the junction design assessment process. The predicted set is in fact the Pareto optimal set of solutions for multiple objectives, e.g. regarding operational, safety and/or environmental impact. The Pareto optimal set of solutions always contains the best solution, whatever set of weights is used for different objectives in a later stage of the assessment process, thus handling multiple objectives in a straightforward manner. The rules are derived from a dataset by using decision tree data mining techniques. For this, a large dataset is first generated, using performance models, with Pareto optimal sets of junction design alternatives for a large amount of, randomly generated, traffic volumes. The approach is applied and evaluated on cases for two different countries. Results show that for over 90% of the situations the Pareto optimal set can be predicted by the new rules, whereas existing rules hardly reach 33%. The new rules provide junction design alternatives with a better performances.

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Control-Type Selection at Isolated Intersections Based on Control Delay under Various Demand Levels

Cited by 13 publications

References 3 publications

Developing and Implementing Manual on Uniform Traffic Control Devices Criteria for Selecting Traffic Control for Unsignalized Intersections

Developing and Implementing Manual on Uniform Traffic Control Devices Criteria for Selecting Traffic Control for Unsignalized Intersections

Toward a Capacity Analysis Procedure for Nonstandard Two-Way Stop-Controlled Intersections

An Approach for Determining Rules used to Select Viable Junction Design Alternatives Based on Multiple Objectives

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