Evaluation of the Effectiveness of a Variable Advisory Speed System on Queue Mitigation in Work Zones
Title | Evaluation of the Effectiveness of a Variable Advisory Speed System on Queue Mitigation in Work Zones PDF eBook |
Author | Aaron B. Wilson |
Publisher | |
Pages | 60 |
Release | 2011 |
Genre | Highway communications |
ISBN |
Variable Advisory Speed Systems (VASS) provide drivers with advanced warning regarding traffic speeds downstream to help them make better decisions. Vehicle use on highways is increasing and the need to improve highways brings increased construction of highways, which increases the need for reducing the number of traffic lanes thus reducing capacity during construction. This often causes queues at the entrance to work zones. The purpose of this study was to evaluate the effectiveness of a VASS at mitigating queues in work zone entrances.
Evaluation and Summary of Studies in Speed Control Methods in Work Zones
Title | Evaluation and Summary of Studies in Speed Control Methods in Work Zones PDF eBook |
Author | R. F. Benekohal |
Publisher | |
Pages | 114 |
Release | 1992 |
Genre | Roads |
ISBN |
This report summarizes and evaluates the important findings from the literature review of the studies on work zone speed control techniques. The following treatments are included in this report: 1) flagging, 2) lane width reduction, 3) law enforcement, 4) changeable message signs (CMS), 5) rumble strips, and 6) flashing beacons. The effects of the speed control treatments on speed and traffic flow are evaluated based on: A) experiences with treatment, B) effects of treatment on speed, C) effectiveness of treatment, and D) comments about treatment. A brief description of the conditions under which the treatments were applied is provided, and the speed reduction effects of each technique are discussed. A reference matrix was prepared to identify publications related to each type of speed reduction treatment used in work zones.
Evaluation of Safety and Operational Effectiveness of Dynamic Lane Merge System in Florida
Title | Evaluation of Safety and Operational Effectiveness of Dynamic Lane Merge System in Florida PDF eBook |
Author | Essam Radwan |
Publisher | |
Pages | 180 |
Release | 2009 |
Genre | Intelligent transportation systems |
ISBN |
Evaluation of Work Zone Speed Advisory System
Title | Evaluation of Work Zone Speed Advisory System PDF eBook |
Author | Mark D. Meisinger |
Publisher | |
Pages | 244 |
Release | 2002 |
Genre | |
ISBN |
Work Zone Operations
Title | Work Zone Operations PDF eBook |
Author | |
Publisher | DIANE Publishing |
Pages | 328 |
Release | 2000 |
Genre | |
ISBN | 1428962298 |
Preparations for Field Testing of Combined Variable Speed Advisory (VSA) and Coordinated Ramp Metering (CRM) for Freeway Traffic Control
Title | Preparations for Field Testing of Combined Variable Speed Advisory (VSA) and Coordinated Ramp Metering (CRM) for Freeway Traffic Control PDF eBook |
Author | Xiao-Yun Lu |
Publisher | |
Pages | 278 |
Release | 2014 |
Genre | Electronic traffic controls |
ISBN |
Evaluation of the Smart Work Zone Speed Notification System
Title | Evaluation of the Smart Work Zone Speed Notification System PDF eBook |
Author | |
Publisher | |
Pages | 135 |
Release | 2019 |
Genre | Electronic traffic controls |
ISBN |
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 of portable Intelligent Lane Control System (ILCS), Portable Changeable Message Signs (PCMS). The hypothesis was that drivers, knowing the speed up to 1 mile downstream, will slow down early or at least be alert and perform smoother decelerations. Video of the SWZSN was analyzed over two years of operation by the Minnesota Traffic Observatory. Overall, the system resulted in beneficial reductions of selected decelerations by the drivers. In situations where the messages communicated to the drivers were consistent and accurate, reductions of more than 30% in the selected deceleration rates were observed. Unfortunately, there were several cases where counterproductive or misleading messages were communicated to the drivers, prompting relative increases to the selected deceleration rates. The most important observation, stemming from both positive and negative influences, was that the speed notification system was noticed by drivers and resulted in a statistically significant influence on driving behavior, unlike other driver alert systems.