Resource Type: Other News Releases
In order to increase safety and mobility in highway work zones, the Arizona Department of Transportation is studying a dynamic merge system, a specific type of smart work zone, at an existing I-40 bri…MoreMerging Control
Simulation 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 …MoreA Review of Traffic Management and Enforcement Problems and Improvement Options at High-Volume, High-Speed Work Zones in Texas (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
This report presents a review of possible safety problems commonly observed at work zones on high-volume, high-speed roadways in Texas. These included excessive speeds upstream and within the work zon…MoreLane-Based Dynamic Merge Control Strategy Based on Optimal Thresholds for Highway Work Zone Operations (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
Despite the potential effectiveness of the dynamic late merge (DLM) control, most existing DLM systems, based on static
thresholds, cannot best perform under time-varying traffic conditions. This pap…MoreDon’t Feel Cheated: ‘Late Mergers’ in Construction Zones can Actually Ease Traffic Congestion (Publication)
Resource Type: 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 …MoreIntegrating Microscopic Simulation and Optimization: Application to Freeway Work Zone Traffic Control (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
This paper presents a methodology for optimizing performance of a traffic system on the basis of simulated observations of its microscopic behavior. The method integrates simulation and optimization s…MoreEffectiveness of Dynamic Messaging on Driver Behavior for Late Merge Lane Road Closures (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
Efforts to improve safety and traffic flow through merge areas on high volume/high speed roadways have included early merge and late merge concepts and several studies of the effectiveness of these co…MoreConstruction Zone Crackdown Set: State Planning No-Merge Zones, Added Patrols (Publication)
Resource Type: News and Other Non-research Articles
Motorists face tougher traffic enforcement in construction zones this year, including doubling of State Police patrols and new no-merge zones. Three construction sites will test no-merge zones, where …MoreDynamic Late Merge Control at Highway Work Zones: Evaluation, Observations, and Suggestions (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
The purpose of this study is to present the evaluation result of a dynamic late merge (DLM) system for highway work zone operations, experimented by the Maryland State Highway Administration and Inter…MorePotential Impact of Speed Reduction at Freeway Lane Closures: A Simulation Study (abridgement) (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
The objective of this study was to evaluate the potential impact of reduced speed limits at temporary freeway lane closures at work zones at arbitrarily assumed levels of compliance. Although some tra…MoreTraffic Flow Characteristics of the “Late Merge” Work Zone Control Strategy (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
Conventional traffic control plans such as the one used in Nebraska ( NDOR Merge) for lane closures of rural Interstate highways normally work well as long as congestion does not develop. However, whe…MoreModeling and Optimization of the Indiana Lane Merge Control System on Approaches to Freeway Work Zones (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
Severe traffic turbulence on entry sections of freeway work zones increases the delays and risk of crash. A new Indiana Department of Transportation system called Indiana Merge Lane System (IMLS) crea…MoreDynamic Late Merge Control Concept for Work Zones on Rural Interstate Highways (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
Conventional traffic control plans for lane closures of rural interstate normally work well as long as congestion does not develop. However, when the traffic demand exceeds the capacity of the work zo…MoreEvaluation of Early Merge Static Work Zone Signing in Oklahoma (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
This research examined the safety and operational benefits of having traffic merge early into the open lane prior to a work zone merge area. A 2007 law in Oklahoma adopted the use of additional “STA…MoreWork Zone Up Ahead: Other States Call TTI for Work Zone Research (Publication)
Resource Type: Books, Reports, Papers, and Research 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 projects…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-…MoreTechnology in Rural Transportation, “Simple Solution” #7 – Lane Drop Driver Awareness (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
Lane drops occur as a result of restricting roadways caused by construction work or other planned or unplanned events. When vehicles fail to merge in a timely fashion, delays or traffic accidents ofte…MoreEvaluation of Supplementary Traffic Control Measures for Freeway Work-zone Approaches (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
Controlling traffic in work-zones to improve safety continues to be a major concern for highway agencies. Three traffic control devices: white lane drop arrows, the CB wizard alert system, and orange …MoreBenefits of Using Intelligent Transportation Systems in Work Zones – A Summary Report (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
This study quantifies benefits of ITS deployments for work zone applications and also documents key lessons learned from previous experience. Agencies interested in deploying similar systems can benef…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…MoreInternational Road Dynamics:Dynamic Lane Merger System (Practice)
IRD developed a system to promote smooth traffic flow leading into a road work zone by creating a dynamic no passing zone near the construction site. The system typically consists of four or five trai… More
New England Merge: A Novel Cooperative Merge Control Method for Improving Highway Work Zone Mobility and Safety (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
Given the aging infrastructure and the anticipated growing number of highway work zones in the United States, it is important to investigate methods to improve work zone mobility and safety. Data sugg…MoreIndiana Lane Merge System for Work Zones on Rural Freeways (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
The Indiana Department of Transportation and Purdue University have been investigating and implementing a novel traffic control system at two-lane freeway work zone entries to reduce the number of agg…MoreLane Closures at Freeway Work Zones: Simulation Study (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
A study of freeway lane closures at work zones is described. It involved the development of a microscopic computer-simulation model. Vehicles in platoons are controlled by a car-following rule. The me…MoreInstructors Urge Students to Read the Signs and Slow down in Work Zones (Publication)
Resource Type: Other News Releases
Many Iowa driver education instructors will be emphasizing work zone safety in classrooms this school year. Teachers are incorporating "A Sudden Change of Plans," a work zone safety curriculum designe…MoreSafety Models for Rural Freeway Work Zones (Publication)
Resource Type: Books, Reports, Papers, and Research Articles
This research is a part of a project aimed at studying the performance and efficacy of the Indiana Lane Merge System (ILMS) in work zone locations. The crash prediction models presented here are impor…More