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Roadwork that results in a lane closure can reduce both the safety and efficiency of a roadway. The dynamic merge is a form of merge control designed to mitigate the potential hazards of lane closures…MoreMerging Control
Dynamic Lane-Based Signal Merge Control for Freeway Work Zone Operations (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
Traditional merge control strategies cannot yield the expected effectiveness under heavy traffic conditions at freeway work zones because inevitable traffic conflicts resulting from complex merging an…MoreModeling Highway Performance Under Various Short-Term Work Zone Configurations (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
Federal rules mandate state departments of transportation and metropolitan planning organizations to measure and report on the performance of highways within their jurisdictions. Those rules support a…MoreEvaluation of Traffic Control Options in Work Zones (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
Lane closures for work zones along freeways produce bottlenecks. These bottlenecks are problematic due to loss of capacity and excessive lane changes, which impact the facility performance represented…MoreSafety Impacts of Signalized Lane Merge Control at Highway Work Zones (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
Lane closures due to highway work zones present many challenges to the goal of ensuring smooth traffic operations and a safe environment for both drivers and workers. Late merge behavior at a work zon…MoreA Smart Highway Work Zone Merge System Enabled by Connected Vehicles (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
Typical traffic control and operations at work zones usually are not very effective in mitigating the work zone bottleneck. A major reason is that the common early merge behaviors limits utilizing the…MoreDynamic Lane Change: How a ‘Traffic Cutter’ Could be Helping (Publication)
Resource Type: News and Other Non-research Articles
Jerry Ullman and his team at Texas A&M Transportation Institute (TTI) have been researching a concept called Dynamic Lane Merge. That is, instead of merging into the upcoming lane closure early…MoreWork Zone Simulator Analysis: Driver Performance and Acceptance of Missouri Alternate Lane Shift Configurations (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
The objective of this project is to evaluate MoDOT’s alternate lane shift sign configuration for work zones. The single sign proposed by MoDOT provides the traveler with enough information to let th…MoreTDOT Explains Why ‘Zipper Merge’ not in TN (Publication)
Resource Type: News and Other Non-research Articles
The zipper merge concept has caught the attention of Tennessee Department of Transportation (TDOT) since Minnesota started using the method for lane closure over five years ago and reported fewer cras…MoreNew “Dynamic Merge System” Could Soon Reduce Traffic Through I-91 Construction (Publication)
Resource Type: News and Other Non-research Articles
The Massachusetts Department of Transportation will place Dynamic Merge System on Interstate 91 in Springfield within the next few weeks to help direct drivers through the construction zone. The I-…MoreModeling Vehicle Merging Behavior in Work Zone Merging Areas During the Merging Implementation Period (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
Using the classification and regression tree (CART) method, this study aims to model the vehicle merging behavior at work zone merging areas during the merging implementation period. Hereafter, the me…MoreMissouri, Kansas Join Other States Pushing ‘Zipper Merge’ (Publication)
Resource Type: Articles, News and Other Non-research Articles
Transportation departments in Missouri and Kansas have joined Minnesota and Washington in urging drivers to use the "zipper merge" method when approaching lane closures. Zipper merging is to use al…MoreEvaluation of Merge Control Strategies at Interstate Work Zones Under Peak and Off-Peak Traffic Conditions (Publication)
Resource Type: Articles, Books, Reports, Papers, and Research Articles
Maintenance and rehabilitation projects of interstate facilities typically mandate lane closures. Lane closures require merging maneuvers that often result in reduced speeds and traffic bottlenecks…MoreWork Zone Simulator Analysis: Driver Performance and Acceptance of Alternate Merge Sign Configurations (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
Improving work zone road safety is an issue of great interest due to the high number of crashes observed in work zones. Departments of Transportation (DOTs) use a variety of methods to inform drivers …MoreReal-Time Merging Traffic Control for Throughput Maximization at Motorway Work Zones (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
Work zones on motorways necessitate the drop of one or more lanes which may lead to significant reduction of traffic flow capacity and efficiency, traffic flow disruptions, congestion creation, and in…MoreMinimizing User Delay and Crash Potential Through Highway Work Zone Planning (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
Lane closures due to highway work zones introduce many challenges to ensuring smooth traffic operations and a safe environment for drivers and workers. In addition, merging has been found to be one of…MoreStudy on Merging Sign Installation in Work Zone of Expressway based on Changeable Critical Headway (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
The purpose of this research was to consider the vehicles’ changeable critical headway when driving along the upper work zone, and reducing conflicts and risks by merging in the end of the warning a…MoreResearch on Dynamic Merge Control at Freeway Expanding Reconstruction Section (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
In order to improve the safety and efficiency of the freeway expanding construction work zone, aiming at the merging traffic before the section, by studying the existing measures to control the mergin…More‘Zipper Merge’ Proposed for Saskatoon Work Zones (Publication)
Resource Type: Articles, News and Other Non-research Articles
Saskatoon is introducing zipper merging, a new method of traffic control, to mitigate traffic congestion in its work zones. Zipper merging requires motorists to use two lanes as they near a merging po…MoreTwo Simplified Intelligent Transportation System-Based Lane Management Strategies for Short-Term Work Zones (Publication)
Resource Type: Articles, News and Other Non-research Articles
Intelligent transportation systems-based lane management technologies were introduced to work zones in an attempt to reduce congestion and diminish queue lengths. Two forms of lane merging–the early…MoreDon’t Feel Cheated: ‘Late Mergers’ in Construction Zones can Actually Ease Traffic Congestion (Publication)
Resource Type: Articles, News and Other Non-research Articles
Most drivers believe they are abiding by proper roadway etiquette when they merge as soon as possible after being notified of a lane closure. Because most drivers merge early, an open lane is created …MoreWork Zone Up Ahead: Other States Call TTI for Work Zone Research (Publication)
Resource Type: Articles
The safety of traffic operations in work zones has been a priority nationwide. This article describes the Texas Transportation Institute (TTI)'s involvement in three recent work zone research project…MoreReal-Time Work Zone Management for Throughput Maximization (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
A simple control concept is proposed for efficient real-time work zone management in cases where the arriving flow exceeds the capacity of the work zone, leading to congestion and reduced efficiency d…MoreSimulation Trials on an Unconventional Alternative to Congestion Mitigation and Traffic Control at Highway Work-Zone Bottlenecks using Advanced Technologies (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
This paper presents a method to integrate the Dynamic Late Merge with a merge metering via wireless communication at the downstream taper area of a work zone, termed as Dynamic Merge Metering Traffic …MoreTwo Simplified Dynamic Lane Merging System (SDLMS) for Short Term Work Zones (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
ITS-based lane management technologies were introduced to work zones in an attempt to reduce congestions and diminish queue lengths. Two forms of lane merging namely the early merge and the late merge…MoreEvaluation of Work Zone Design Features to Aid Older Drivers (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
Work zones are estimated to account for 22 percent of roadway crashes and more than 1000 fatalities annually. Moreover, older road users have been overrepresented in work zone crashes. In an effort to…More