Operation of signalized diamond interchanges with frontage roads using dynamic reversible lane control

2019 ◽

Vol 2673 (4) ◽

pp. 627-639

Author(s):

Hongmin “Tracy” Zhou ◽

Jonathan Tydlacka ◽

Liang Ding

Keyword(s):

Data Collection ◽

Field Data ◽

Simulation Analysis ◽

Factors Affecting ◽

Operational Conditions ◽

Field Data Collection ◽

Diamond Interchanges ◽

Operational Issues ◽

Frontage Roads

U-turn lanes are commonly provided at at-grade diamond interchanges with frontage roads to reduce delays for U-turning traffic and for the interchange as a whole; however, there are currently many unknowns related to their design, operation, and use. Researchers of this study assessed the existing practice of U-turn implementation by evaluating operations of U-turn lanes at 25 diamond interchanges in Texas through field data collection and simulation analysis. Researchers determined the performance and limitations of U-turn lanes under various geometric and operational conditions, identified and investigated several factors affecting U-turn lane use, and determined the anticipated effectiveness of proposed solutions to U-turn operational issues. This paper provides implementable guidelines for designing and operating U-turn lanes at diamond interchanges. Among the ten countermeasures studied in this paper, closing nearby driveways, adding acceleration lane for U-turn departures, and separating U-turn departures from conflicting traffic using pylons were found to be effective solutions to improve U-turn operations.

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Calibration and Field Validation of Four Double-Crossover Diamond Interchanges in VISSIM Microsimulation

Transportation Research Record Journal of the Transportation Research Board ◽

10.3141/2404-06 ◽

2014 ◽

Vol 2404 (1) ◽

pp. 49-58 ◽

Cited By ~ 7

Author(s):

Bastian J. Schroeder ◽

Katayoun Salamati ◽

Joseph Hummer

Keyword(s):

Field Validation ◽

Double Crossover ◽

Diamond Interchanges

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Control Delay Calculation at Diverging Diamond Interchanges

Transportation Research Record Journal of the Transportation Research Board ◽

10.3141/2257-14 ◽

2011 ◽

Vol 2257 (1) ◽

pp. 121-130 ◽

Cited By ~ 6

Author(s):

Hao Xu ◽

Hongchao Liu ◽

Zong Tian ◽

Weihua Zhang

Keyword(s):

Control Delay ◽

Diamond Interchanges

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New Intersection Crash Prediction Models for the Second Edition of the Highway Safety Manual

Transportation Research Record Journal of the Transportation Research Board ◽

10.1177/03611981211039842 ◽

2021 ◽

pp. 036119812110398

Author(s):

Darren J. Torbic ◽

Daniel Cook ◽

Joseph Grotheer ◽

Richard Porter ◽

Jeffrey Gooch ◽

...

Keyword(s):

Traffic Control ◽

Prediction Models ◽

Highway Safety ◽

Crash Severity ◽

Crash Prediction ◽

Part C ◽

Highway Safety Manual ◽

Rural And Urban ◽

Diamond Interchanges ◽

Crash Prediction Models

The objective of this research was to develop new intersection crash prediction models for consideration in the second edition of the Highway Safety Manual (HSM), consistent with existing methods in HSM Part C and comprehensive in their ability to address a wide range of intersection configurations and traffic control types in rural and urban areas. The focus of the research was on developing safety performance functions (SPFs) for intersection configurations and traffic control types not currently addressed in HSM Part C. SPFs were developed for the following general intersection configurations and traffic control types: rural and urban all-way stop-controlled intersections; rural three-leg intersections with signal control; intersections on high-speed urban and suburban arterials (i.e., arterials with speed limits greater than or equal to 50 mph); urban five-leg intersections with signal control; three-leg intersections where the through movements make turning maneuvers at the intersections; crossroad ramp terminals at single-point diamond interchanges; and crossroad ramp terminals at tight diamond interchanges. Development of severity distribution functions (SDFs) for use in combination with SPFs to estimate crash severity as a function of geometric design elements and traffic control features was explored; but owing to challenges and inconsistencies in developing and interpreting the SDFs, it was recommended for the second edition of the HSM that crash severity for the new intersection configurations and traffic control types be addressed in a manner consistent with existing methods in Chapters 10, 11, and 12 of the first edition, without use of SDFs.

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Program for Optimizing Diamond Interchanges in Oversaturated Conditions

Transportation Research Record Journal of the Transportation Research Board ◽

10.3141/1811-20 ◽

2002 ◽

Vol 1811 (1) ◽

pp. 166-176 ◽

Cited By ~ 7

Author(s):

Vijay G. Kovvali ◽

Carroll J. Messer ◽

Nadeem A. Chaudhary ◽

Chi-Leung Chu

Keyword(s):

Diamond Interchanges

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Modeling the Risk of Wrong-Way Driving Entry at the Exit Ramp Terminals of Full Diamond Interchanges

Transportation Research Record Journal of the Transportation Research Board ◽

10.1177/0361198118783152 ◽

2018 ◽

Vol 2672 (17) ◽

pp. 35-47 ◽

Cited By ~ 2

Author(s):

Md Atiquzzaman ◽

Huaguo Zhou

Keyword(s):

Traffic Control ◽

Initial Point ◽

Geometric Design ◽

Design Features ◽

Entry Points ◽

Control Devices ◽

Traffic Control Devices ◽

Diamond Interchanges ◽

Transportation Agencies ◽

Exit Ramp

Wrong-way driving (WWD) crashes are a critical safety issue on freeways. Although these crashes are rare and random in nature, they often result in severe injuries and/or fatalities. Typically, exit ramp terminals are the initial point of entry for wrong-way (WW) drivers on freeways. Therefore, it is important for transportation agencies to identify the exit ramp terminals with higher possibility of WW entries and apply safety countermeasures to reduce the chances of their occurrence. However, the random nature of WWD crashes and the difficulty in identifying the actual entry points makes it hard for transportation agencies to assess the risk of WWD at a particular exit ramp terminal and apply countermeasures accordingly. This study developed mathematical models for predicting the risk of WW entries at the exit ramp terminals of full diamond interchanges. The geometric design features, usage of traffic control devices, area type where the interchanges are located, and annual average daily traffic (AADT) at the exit ramp terminals with or without history of WWD were used as potential predictors of WW entry. Transportation agencies can use these models to assess the risk of WW entries at the exit ramp terminals within their jurisdictions and consider possible countermeasures. They also can be applied during the design phase to determine the combination of geometric design features and traffic control devices that ensures the least possibility of WW entry.

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