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Planning for Active Traffic Management in Virginia

2012 Traffic congestion
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Release : 2012
Genre : Traffic congestion
Kind : eBook
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Book Synopsis Planning for Active Traffic Management in Virginia by : Michael D. Fontaine

Download or read book Planning for Active Traffic Management in Virginia written by Michael D. Fontaine. This book was released on 2012. Available in PDF, EPUB and Kindle. Book excerpt: Active Traffic Management (ATM) applications, such as variable speed limits, queue warning systems, and dynamic ramp metering, have been shown to offer mobility and safety benefits. Yet because they differ from conventional capacity investments in terms of cost, service life, and operating requirements, how to incorporate them into the planning process is not clear. To facilitate such incorporation, this study developed guidelines for considering ATM deployments. The guidelines consist of four sets. The first set identifies required infrastructure and operational conditions, such as sensor placement and queueing behavior, to apply a particular ATM technique at a given site. The second set presents sketch planning analysis methods to estimate the operational and safety benefits of applying the particular technique at the site; these may be refined with the third set concerning a more detailed (and accurate) simulation analysis. The fourth set concerns continued monitoring of an ATM deployment at a given site. Also provided is a framework for incorporating ATM concepts into the regional planning process. The framework is illustrated with a hypothetical case study of variable speed limits implemented on I-66 in Virginia. Although Virginia metropolitan planning organizations (MPOs) and the Virginia Department of Transportation already consider operational initiatives to some degree within the planning process, a key finding of this study is that there are several ways to strengthen the inclusion of operational initiatives. These include (1) using the guidelines developed in this study; (2) linking ATM initiatives to the MPO's Congestion Management Process; (3) facilitating the computation of operational-related performance measures such as total vehicle-hours per day; and (4) emphasizing, when applicable, the safety and environmental aspects of ATM. The rationale for such aspects is not to promote ATM as being more effective than other types of investments but rather to compare ATM objectively with these other types of investments. For example, Appendix A illustrates how to compute a benefit-cost ratio where costs include capital and operations expenditures for the ATM and where benefits include monetized values of vehicle-houts of delay plus crash costs. In this manner, the benefit-cost ratio for an ATM project may be compared to the benefit-cost ratio for other operational or capacity projects.

Traffic Management Teams

1988 Express highways
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Release : 1988
Genre : Express highways
Kind : eBook
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Book Synopsis Traffic Management Teams by : Benjamin H. Cottrell

Download or read book Traffic Management Teams written by Benjamin H. Cottrell. This book was released on 1988. Available in PDF, EPUB and Kindle. Book excerpt: A traffic management team improves the overall traffic operations in an urban area, especially along urban corridors, through the communication, coordination, and cooperation of the transportation-related operational agencies in the area. Since various state, county, and city agencies are responsible for the ground transportation system in an urban area for optimal traffic management, it is essential that these agencies work together. Traffic management teams have proven to be a very successful means of coordinating the activities of transportation-related operational agencies in urban areas in Texas. A team typically consists of representatives of city and state traffic engineering offices, city and state law enforcement agencies, and the local transit authority. Other agencies are included if they are significantly involved in the operation of the urban corridors. Although most advantageous in cities with populations above 300,000, traffic management teams are useful for any size city where major travel corridors cross jurisdictional boundaries and where there is a need. to improve relationships between transportation operational agencies. The activities that are coordinated by a team include: (1) work zone traffic, (2) route improvements, (3) normal operations, (4) emergency planning, and (5) special event traffic handling. Guidelines for a traffic management team based on what has been successful for exisiting teams are presented. The guidelines include organizational structure, conduct of team meetings, keys to success, and measures of effectiveness. An action plan for implementation of traffic management teams in Virginia was developed. In the plan, urban areas where traffic management teams would be useful are identified, and steps to implement a traffic management team are identified. It is recommended that traffic management teams be implemented in all urban areas in Virginia. These teams would be especially advantageous for the Northern Virginia, Richmond, and Tidewater areas.

Implementing Active Traffic Management Strategies in the U.S.

2009 Traffic congestion
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Release : 2009
Genre : Traffic congestion
Kind : eBook
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Book Synopsis Implementing Active Traffic Management Strategies in the U.S. by : Virginia P. Sisiopiku

Download or read book Implementing Active Traffic Management Strategies in the U.S. written by Virginia P. Sisiopiku. This book was released on 2009. Available in PDF, EPUB and Kindle. Book excerpt:

Guidelines for Developing Transportation Management Plans in Virginia

2005 Roads
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Release : 2005
Genre : Roads
Kind : eBook
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Book Synopsis Guidelines for Developing Transportation Management Plans in Virginia by : Benjamin H. Cottrell

Download or read book Guidelines for Developing Transportation Management Plans in Virginia written by Benjamin H. Cottrell. This book was released on 2005. Available in PDF, EPUB and Kindle. Book excerpt: A transportation management plan (TMP) is a comprehensive program of traffic control, communication, operation, and demand management strategies designed to maintain acceptable levels of traffic flow in work zones. A systematic procedure and/or checklist is needed for developing plans to lessen the impact of construction projects that restore or improve highways. The purpose of this research was to establish guidelines for developing TMPs for construction projects. Three questions were addressed by the guidelines: When should a TMP be developed? How should a TMP be developed? What should be in a TMP? The Federal Highway Administration published the Final Rule on Work Zone Safety and Mobility on September 9, 2004. It facilitates the comprehensive consideration of the broader safety and mobility impacts of work zones across project development stages and the adoption of additional strategies including TMPs that help manage these impacts during project implementation. Guidelines for TMPs were derived from a draft implementation guide for the final rule with minor revisions. TMPs may consist of up to three components: (1) a temporary traffic control plan that describes traffic control measures used to facilitate road users through a work zone; (2) transportation operations strategies that will be used to ease work zone impacts; and (3) public information strategies to inform those affected by the project of the expected work zone impacts and changing conditions. At a minimum, each TMP should have a temporary traffic control plan. It is recommended that the Virginia Department of Transportation implement the guidelines developed in this study.

Evaluation of the Impact of the I-66 Active Traffic Management System

2016 Traffic congestion
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Release : 2016
Genre : Traffic congestion
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Book Synopsis Evaluation of the Impact of the I-66 Active Traffic Management System by : PilJin Chun

Download or read book Evaluation of the Impact of the I-66 Active Traffic Management System written by PilJin Chun. This book was released on 2016. Available in PDF, EPUB and Kindle. Book excerpt: Construction of a Virginia Department of Transportation project to install an Active Traffic Management (ATM) system on I-66 from U.S. 29 in Centreville to the Capital Beltway (I-495) was completed in September 2015. The project was constructed to improve safety and operations on I-66 through better management of existing roadway capacity. The main components of the ATM system were advisory variable speed limits (AVSL), queue warning systems (QWS), lane use control signs (LUCS), and hard shoulder running (HSR). Since ATM is still a relatively new approach in the United States, there was a need to analyze the effects of the I-66 ATM. Thus, a before-and-after study was conducted to quantify its effectiveness. The study used "after" data from October 2015-February 2016 (21 weeks) for the operations analysis and data from October 2015-December 2015 (13 weeks) for the safety analysis. Operations and safety evaluations were performed using limited data, so the results should be considered preliminary. The operational measures of effectiveness (MOEs) included ATM utilization rate, average travel time, travel time reliability, and total travel time delay. The safety MOEs included crash rates by type and severity and incident frequency. These MOEs were analyzed using INRIX travel time data, limited traffic volume point sensor data, police crash reports, and iPeMS traffic incident data. Segment-level analysis was performed to determine the segments that benefitted the most from ATM implementation. From this segment-level analysis, it was determined that HSR was the ATM component that led to most of the improvements on I-66. The results of the study indicate that the ATM produced positive operational and safety benefits across multiple MOEs. The ATM generally had limited operational and safety impacts during the weekday peak periods and some impacts during the midday and off-peak weekday periods. Average weekday travel times during the midday period in the off-peak direction typically improved by 2% to 6%. However, weekday peak period travel times and travel time reliability in the peak direction continued to degrade after ATM installation. This was not surprising given that HSR was already in use during the weekday peak periods before ATM activation and there has been a historic trend of increased travel times on the corridor. There were large operational benefits on weekends, with average travel times and travel time reliability improving by approximately 10% during the weekend peak periods. The weekend improvements were most likely due to the activation of HSR, which had not been active during weekends before ATM implementation, so the additional capacity served to alleviate congestion after activation. The safety analysis showed promising results for weekends, but no solid conclusions could be formed because of the limited data available for the safety analysis. A planning-level benefit-cost ratio was calculated based on the initial operational and safety benefits. The ATM had a benefit-cost ratio of 1.54 based on conservative assumptions that used only weekend operational improvements. This indicates that the I-66 ATM was a cost-efficient solution for improving operations and safety on I-66. The study recommends expansion of ATM in Virginia and further study.

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