Download or read book Traffic Management Strategies for Merge Areas in Rural Interstate Work Zones written by and published by . This book was released on 1999 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Iowa Department of Transportation (Iowa DOT) sponsored the Center for Transportation Research and Education (CTRE) conduct of research on the capacity and driver merge behavior at Interstate work zone merge areas. The principle goal of this research is to determine the traffic capacity at work zone locations where two lanes of traffic are reduced to one (lane closure). Reducing two traffic lanes to one in each direction is the typical method of channeling traffic into a work zone on Iowa's rural Interstate system. When traffic volumes exceed the capacity of these merge points, the resulting congestion can lead to the formation of queues, which result in delays and increases the potential for traffic crashes. Successful implementation of work zone improvements at locations where congestion is expected will provide a benefit to motorists through reduced delays and increased safety. The research project was conducted in four phases: a literature review, the collection of traffic data at work zone merge areas, the analysis of this data, and the development of a computer simulation tool to model traffic at merge areas.
Download or read book Work Zone Simulation Model written by T. H. Maze and published by . This book was released on 1999 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: To support the analysis of driver behavior at rural freeway work zone lane closure merge points, Center for Transportation Research and Education staff collected traffic data at merge areas using video image processing technology. The collection of data and the calculation of the capacity of lane closures are reported in a companion report, "Traffic Management Strategies for Merge Areas in Rural Interstate Work Zones". These data are used in the work reported in this document and are used to calibrate a microscopic simulation model of a typical, Iowa rural freeway lane closure. The model developed is a high fidelity computer simulation with an animation interface. It simulates traffic operations at a work zone lane closure. This model enables traffic engineers to visually demonstrate the forecasted delay that is likely to result when freeway reconstruction makes it necessary to close freeway lanes. Further, the model is also sensitive to variations in driver behavior and is used to test the impact of slow moving vehicles and other driver behaviors. This report consists of two parts. The first part describes the development of the work zone simulation model. The simulation analysis is calibrated and verified through data collected at a work zone in Interstate Highway 80 in Scott County, Iowa. The second part is a user's manual for the simulation model, which is provided to assist users with its set up and operation. No prior computer programming skills are required to use the simulation model.
Download or read book Highway Work Zone Safety written by United States. Congress. House. Committee on Transportation and Infrastructure. Subcommittee on Highways and Transit and published by . This book was released on 2001 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Highway Work Zone Design and Traffic Management Decision System written by Yali Chen and published by . This book was released on 2008 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Traffic Management and Enforcement Tools to Improve Work Zone Safety written by and published by . This book was released on 2002 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report written by and published by . This book was released on 1964 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Strategies for Work Zone Transportation Management Plans written by Leverson Boodlal and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the ways a state department of transportation or other transportation agency can address work zone safety and other impacts is to develop and implement a Transportation Management Plan (TMP). The TRB National Cooperative Highway Research Program's NCHRP Research Report 945: Strategies for Work Zone Transportation Management Plans provides a practitioner-ready guidebook on how to select and implement strategies that improve safety and traffic operations in roadway construction work zones. Supplemental materials to the report include NCHRP Web-Only Document 276: Evaluating Strategies for Work ZoneTransportation Management Plans; fact sheets on ramp meter, reversible lane, and truck restrictions; and guidebook appendices.
Download or read book Efficient Transportation and Pavement Systems Characterization Mechanisms Simulation and Modeling written by Imad L. Al-Qadi and published by CRC Press. This book was released on 2008-11-01 with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt: Internationally, significant attention is given to transport sustainability including planning, design, construction, evaluation, safety and durability of the road system. The 4th International Gulf Conference on Roads: Efficient Transportation and Pavement Systems - Characterization, Mechanisms, Simulation, and Modeling, hosted by the University o
Download or read book Traffic Management During Freeway Reconstruction and in Rural Work Zones written by Stephen H. Richards and published by . This book was released on 1982 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of the Late Merge Work Zone Traffic Control Strategy written by Andrew G. Beacher and published by . This book was released on 2004 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Several alternative lane merge strategies have been proposed in recent years to process vehicles through work zone lane closures more safely and efficiently. Among these is the late merge. With the late merge, drivers are instructed to use all lanes to the merge point and then take turns proceeding through the work zone. Its efficiency has been tested on only a limited basis. The purpose of this project was to determine when, if at all, deployment of the late merge was beneficial. The late merge concept was evaluated by comparing it to the traditional merge using computer simulations and field evaluations. Computer simulations included analysis of 2-to-1, 3-to-1, and 3-to-2 lane closure configurations to determine its impact on throughput and the impact of factors such as free flow speed, demand volume, and percentage of heavy vehicles. Field tests were limited to 2-to-1 lane closures, as recommended by state transportation officials, and examined the impact of treatment type on vehicle throughput, percentage of vehicles in the closed lane, and time in queue. Results of the computer simulations showed the late merge produced a statistically significant increase in throughput volume for only the 3-to-1-lane closure configuration and was beneficial across all factors for this type of closure. For the 2-to-1 and 3-to-2 lane closure configurations, the late merge increased throughput when the percentage of heavy vehicles was large. Field tests showed similar trends with regard to throughput. Although throughput increased, the increase was not statistically significant because of the limited number of heavy vehicles at the site. More drivers were in the closed lane, indicating a response to the late merge signs. Time in queue was also reduced, although the reductions were not statistically significant. The authors conclude that the late merge should be considered for 3-to-1 lane closure configurations but not until a sound methodology for deployment has been developed and tested in the field. For the 2-to-1 and 3-to-2 configurations, the late merge should be implemented only when the percentage of heavy vehicles is at least 20 percent.
Download or read book Evaluation of Alternative Rural Interstate Work Zone Traffic Management Plans Using Simulation written by Steven Dale Schrock and published by . This book was released on 1999 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: This represents approximately an 86 percent reduction in delay reduction compared with the "do nothing" alternative. A sensitivity analysis altered several of the assumed variables in the research, and found that the non-stop work alternative remained cost-effective throughout the range of values studied. This research developed a method for modeling and analyzing alternative traffic management plans at interstate work zones. This method can be used as a planning tool by a highway agency in determining the impact of alternative traffic management plans at future work zones. In this way, highway agencies can minimize the delays caused by these work zones.
Download or read book Impact of Trucks on Arterial LOS and Freeway Work Zone Capacity written by and published by . This book was released on 2007 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Traffic Control Strategies in Work Zones with Edge Drop offs written by Edward J. Kannel and published by . This book was released on 2002 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pavement and shoulder edge drop-offs commonly occur in work zones as the result of overlays, pavement replacement, or shoulder construction. The depth of these elevation differentials can vary from approximately one inch when a flexible pavement overlay is applied to several feet where major reconstruction is undertaken. The potential hazards associated with pavement edge differentials depend on several factors including depth of the drop-off, shape of the pavement edge, distance from traveled way, vehicle speed, traffic mix, volume, and other factors. This research was undertaken to review current practices in other states for temporary traffic control strategies addressing lane edge differentials and to analyze crash data and resultant litigation related to edge drop-offs. An objective was to identify cost-effective practices that would minimize the potential for and impacts of edge drop crashes in work zones. Considerable variation in addressing temporary traffic control in work zones with edge drop-off exposure was found among the states surveyed. Crashes related to pavement edge drop-offs in work zones do not commonly occur in the state of Iowa, but some have resulted in significant tort claims and settlements. The use of benefit/cost analysis may provide guidance in selection of an appropriate mitigation and protection of edge drop-off conditions. Development and adoption of guidelines for design of appropriate traffic control for work zones that include edge drop-off exposure, particularly identifying effective use of temporary barrier rail, may be beneficial in Iowa.
Download or read book Traffic Control Strategies for Congested Freeways and Work Zones written by and published by . This book was released on 2008 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of the research was to identify and evaluate effective ways of improving traffic operations and safety on congested freeways. There was particular interest in finding condition-responsive traffic control solutions for the following problem areas: (1) end-of-queue warning, (2) work zones with lane closure, and (3) queue spillover at exit ramps. Available techniques considered by this research include combination of static and dynamic queue warning systems, dynamic merge control in advance of freeway lane closures, and various traffic control strategies, such as traffic diversion and ramp metering, to mitigate queue spillover at exit ramps. Three sets of evaluation studies were conducted: first, two queue warning systems deployed on IH 610 and US 59 in Houston, Texas, were evaluated based on field observations. Second, strategies to resolve a ramp spillover problem at an exit ramp in El Paso, Texas, were analyzed using traffic simulations. Third, the Dynamic Merge work zone traffic control concept was evaluated using traffic simulations, and recommendations were developed for its potential use for various work zone types with different lane closure configurations.
Download or read book Alternative Driver Information to Alleviate Work zone related Delays written by Patrick T. McCoy and published by . This book was released on 1999 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Survey of Driver s Opinion about Work Zone Traffic Control on a Rural Highway written by R. F. Benekohal and published by . This book was released on 1990 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modeling Merging Behavior at Lane Drops written by Shauna Hallmark and published by . This book was released on 2015 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt:
