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National Work Zone Safety Information Clearinghouse

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You are here: Home / All entries for Intelligent Transportation Systems / Changeable Message Signs

Changeable Message Signs

Featured Items:

Minnesota IWZ Toolbox: Guideline for Intelligent Work Zone System Selection (Publication)

Resource Type: Manuals, Policies, Guidelines, and Handbooks, etc.
The IWZ Toolbox has been prepared as a guideline for selecting an appropriate Intelligent Work Zone (IWZ) System for existing work zone traffic issues and to mitigate anticipated issues on scheduled p…More

Quality Guidelines for Temporary Traffic Control Devices and Features (Publication)

Resource Type: Manuals, Policies, Guidelines, and Handbooks, etc.
This pocket-size handbook helps contractors and agency personnel determine when a traffic control device has outlived its usefulness. Color photos and/or written descriptions of work zone devices illu…More

“Speed up to Hit the Worker”: Impact of Hacked Road Signs on Work Zone Safety (Publication)

Resource Type: Books, Reports, Papers, and Research Articles
This study sheds light on the travel behavior of drivers when they encounter fabricated messages in work zones. Using the response of 4302 participants to a stated preference survey, researchers devel…More

Driver Feedback on Monetary Penalty and Its Impact on Work Zone Speed (Publication)

Resource Type: Books, Reports, Papers, and Research Articles
Across the nation, one work zone fatality occurs every 10 h (about 2.3 per day) and one injury, every 13 min (110 per day). Speed limit compliance in and around work zones concerns transportation agen…More

Behind the Scenes: How Traffic is Controlled During Construction, Crashes (Publication)

Resource Type: News and Other Non-research Articles
As part of the $1B Project Neon upgrade, an overhead digital messaging sign was installed on U.S. Highway 95 southbound at MLK in Downtown Las Vegas. This article details how the sign is run by the So…More

Seldom-Used Warning Signs Show Lack of Closure Policy on Trans-Canada Highway: Fire Chief (Publication)

Resource Type: News and Other Non-research Articles
After a 12-hour Trans-Canada Highway closure at Sackville due to winds and low visibility five years ago, emergency responders, the RCMP, representatives from the towns of Sackville and Amherst, N.S. …More

Smart Speed Warnings Alert Drivers Nearing Freeway Work Zones (Publication)

Resource Type: News and Other Non-research Articles
Speeding in highway work zones has caused unexpected congestion and crashes. To combat this problem, the Minnesota Department of Transportation developed a Smart Work Zone Speed Notification (SWZSN) s…More

ARTBA’s Online Learning Center Promotes Safety (Publication)

Resource Type: News and Other Non-research Articles
The ARTBA Online Learning Center offers self-directed courses on a range of transportation construction topics. Those courses are developed by industry experts to help you train for career advancement…More

NDDOT Deploys New Traffic Warning System for Construction Season (Publication)

Resource Type: News and Other Non-research Articles
The North Dakota Department of Transportation is deploying a new traffic warning system on Interstate 94 to reduce crashes during construction season. New interactive caution signs are connected to se…More

Cumbria Highways Signs are Multilingual (Publication)

Resource Type: News and Other Non-research Articles
Highways England has started giving warning in nine foreign languages on several of its portable electronic variable messages signs to better communicate road work and closure information to lorry dri…More

Cost Benefit: Wichita Eases Workzone Congestion (Publication)

Resource Type: News and Other Non-research Articles
Delays in work zones have caused about 10% of highway congestion in the US. The lack of accessible real-time traffic information to help motorists is a major contributor. One effective solution is the…More

Evaluation of the Smart Work Zone Speed Notification System (Publication)

Resource Type: Books, Reports, Papers, and Research Articles
The Smart Work Zone Speed Notification (SWZSN) system aims to alleviate congestion, queuing, and rear end crashes in work zones by informing drivers of the speed of the downstream segment using a type…More

Research on the Relationship Between Dynamic Message Sign Control Strategies and Driving Safety in Freeway Work Zones (Publication)

Resource Type: Books, Reports, Papers, and Research Articles
Several studies have researched the effect of dynamic message signs (DMSs) on the driving safety in work zones. However, only a few studies have examined the design of DMS control strategies in work z…More

Toronto Safe Work Zone Pilot Brings Highway Safety Concept to City (Publication)

Resource Type: News and Other Non-research Articles
Highway drivers have become accustomed to bold signs in work zones, advising them about lane reductions and travel delays. The City of Toronto is testing a similar concept as part of its Smart Work Zo…More

ODOT Making Changes After Eighth Crashes off I-270 (Publication)

Resource Type: News and Other Non-research Articles
Eight trucks went off the highway since April. Those crashes have coincided with highway lanes narrowing and shifting caused by an I-270 widening project. To prevent such crashes in the future, Ohio D…More

Iowa Work Zones are Getting Smarter (Publication)

Resource Type: News and Other Non-research Articles
Intelligent Transportation Systems (ITS) tools including traffic sensors and cameras are deployed in 28 state highway work zones in Iowa. Those tools sent data on traffic speed, queue length, and imag…More

Practices in One-Lane Traffic Control on a Two-Lane Rural Highway (Publication)

Resource Type: Books, Reports, Papers, and Research Articles
Temporary traffic control, also known as maintenance of traffic, is critical to minimizing congestion and maintaining mobility during planned and unplanned activities as well as providing a safe work …More

Theory of Safety Surrogates Using Vehicle Trajectories in Macroscopic and Microscopic Settings: Application to Dynamic Message Signs Controlled Traffic at Work Zones (Publication)

Resource Type: Books, Reports, Papers, and Research Articles
This paper presents a new mathematical framework for obtaining quantitative safety measure using macroscopic as well as microscopic traffic data. The safety surrogate obtained from the macroscopic dat…More

Temporary Construction Signage: Driver Preferences for Work Zone Safety (Publication)

Resource Type: Books, Reports, Papers, and Research Articles
A current concern in roadway construction is the behavior of drivers in response to the location and frequency of construction and permanent signage prior to and within the construction work zone. A r…More

Digital Message Signs Being Installed Throughout Interstate 75 (Publication)

Resource Type: News and Other Non-research Articles
The Florida Department of Transportation is installing digital message signs on Interstate 75 as part of their $12 million project. This project will hopefully assist motorists with current travel inf…More

Increasing Speed Limit Compliance in Motorway Work Zones: A Human System Integration Approach (Publication)

Resource Type: Books, Reports, Papers, and Research Articles
Speeding in motorway work zones lowers the perceived safety of road workers and increases the accident risks of traffic participants. In a work zone, traffic participants share the road with road work…More

Using Smartphones to Deliver Effective In-Vehicle Work Zone Messages (Publication)

Resource Type: News and Other Non-research Articles
This blog post provides a summary of what have been done with the Minnesota Department of Transportation (MnDOT) study on using smartphones to deliver in-vehicle work zone messages.More

Effectiveness of End-of-Queue Warning Systems and Portable Rumble Strips on Lane Closure Crashes (Publication)

Resource Type: Books, Reports, Papers, and Research Articles
The Texas Department of Transportation has been deploying work zone intelligent transportation systems in an effort to reduce the number of work zone crashes along the Interstate 35 (I-35) corridor. R…More

Evaluating the Effects of Queue Warning Systems on Freeway Work Zones Using Traffic Simulation Software (Publication)

Resource Type: Books, Reports, Papers, and Research Articles
Work zones are a key component of the rehabilitation efforts that travelers on the U.S. national highway system interact with increasingly every day. Roadway construction, rehabilitation, and maintena…More

In-Vehicle Work Zone Messages (Publication)

Resource Type: Books, Reports, Papers, and Research Articles
Work zones present an increased risk to drivers and the work crew. To mitigate these risks, this study investigated the potential effects of in-vehicle messages to communicate work zone events to the …More

Analyzing and Improving the Performance of Dynamic Message Sign Reporting Work Zone—Related Congestion (Publication)

Resource Type: Books, Reports, Papers, and Research Articles
Dynamic message sign (DMS) systems aim to provide realistic, reliable, and real-time traffic information to roadway users. This study investigated the performance of a DMS present at a work zone that …More

Work Zone Sign Design for Increased Driver Compliance and Worker Safety (Publication)

Resource Type: Books, Reports, Papers, and Research Articles
Many studies have investigated the effect of dynamic message signs (DMS) on drivers’ speed reduction and compliance in work zones, yet only a few studies have examined the design of sign content of …More
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