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Freeway Work Zone Lane Capacity
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Book Synopsis Updated Short-term Freeway Work Zone Lane Closure Capacity Values by : Raymond A. Krammes
Download or read book Updated Short-term Freeway Work Zone Lane Closure Capacity Values written by Raymond A. Krammes and published by . This book was released on 1992 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recommendations on estimating the capacity of short-term freeway work zone lane closures are presented. The recommendations are based upon 45 hours of capacity counts at 33 different work zones between 1987 and 1991. These new data indicate average capacities for short-term freeway work zone lane closures from 3 to 1 lanes and from 2 to 1 lanes that are significantly higher than older values reported in the 1985 Highway Capacity Manual. A base capacity value of 1,600 pcphpl is recommended for all short-term freeway work zone lane closure configurations.
Book Synopsis Freeway Work Zone Lane Capacity by : Alex Drakopoulos
Download or read book Freeway Work Zone Lane Capacity written by Alex Drakopoulos and published by . This book was released on 2009 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: The focus of this report is a capacity analysis of two long-term urban freeway Work Zones. Work Zone #1 tapered four mainline lanes to two, using two separate tapers; Work Zone #2 tapered two mainline lanes to one. Work Zone throughput was analyzed throughout the day over multiple days and traffic operations conditions were analyzed up to a distance of five miles upstream of the Work Zone entrance. Historical data from pavement-embedded detectors were used to analyze traffic conditions. The database consisted of five-minute volume, speed and occupancy data collected from 78 detectors for a total of 50 days. Congestion during each analyzed Work Zone existed for more than fourteen hours each day; Work Zone impacts adversely affected freeway operations over distances of 3.7 to 4.2 miles. Speed and occupancy conditions further upstream were, however, not affected, or even improved due to significant trip diversion. Work Zone capacity was defined based on the maximum traffic flows observed over a one-hour period; throughput values were also compiled over longer periods of time when traffic was within 90% of the maximum observed one-hour flows, as well as over the multi-hour mid-day period. The Highway Capacity Manual freeway capacity definition based on the maximum observed 15-min period was not used, since it would have no practical application in estimating Work Zone throughput when congested conditions prevail for the majority of the hours of the day. Certain noteworthy changes took place for the duration of the analyzed Work Zones: per-lane throughput dropped; morning peak periods started earlier, evening peak periods ended later and lasted longer; mid-day volumes dropped accompanied by the highest occupancies of the day. Trip diversion was evident in lower volumes entering the analyzed freeway corridor, higher volumes using off-ramps and lower volumes using onramps upstream of the Work Zones. The majority of diverted traffic comprised smaller vehicles (vehicles up to 21 feet in length); combination truck volumes increased and their use of the median lane increased, contrary to smaller vehicles that shifted toward a heavier use of the shoulder lane.
Book Synopsis Work Zone Lane Closure Analysis Model by :
Download or read book Work Zone Lane Closure Analysis Model written by and published by . This book was released on 2009 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Impact of Trucks on Arterial LOS and Freeway Work Zone Capacity by :
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:
Book Synopsis Updated Capacity Values for Short-term Freeway Work Zone Lane Closures by : Raymond A. Krammes
Download or read book Updated Capacity Values for Short-term Freeway Work Zone Lane Closures written by Raymond A. Krammes and published by . This book was released on 1994 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Capacity and Road User Cost Analysis of Selected Freeway Work Zones in Texas by : Darrell W. Borchardt
Download or read book Capacity and Road User Cost Analysis of Selected Freeway Work Zones in Texas written by Darrell W. Borchardt and published by . This book was released on 2009 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research was developed to produce usable and meaningful estimates for work zone capacities under a variety of roadway and traffic conditions, work zone configurations, and lane closure scenarios within Texas. Using data collected at eighteen work zone sites, the research presents updated guidance for expected capacities of various freeway work zone lane closure configurations. In addition, models used to evaluate traffic conditions in work zones were evaluated and recommendations for their use were made. Finally, recommendations concerning road user cost analysis for freeway construction projects are included.
Book Synopsis Evaluation of Interstate Highway Capacity in Short-term Work Zones by : Wayne A. Sarasua
Download or read book Evaluation of Interstate Highway Capacity in Short-term Work Zones written by Wayne A. Sarasua and published by . This book was released on 2005 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Construction Work Zone Operational Issues by :
Download or read book Evaluation of Construction Work Zone Operational Issues written by and published by . This book was released on 2003 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Road Construction Intensity and Operations on Rural Freeway Work Zone Capacity by : Ronaldo Luna
Download or read book Effects of Road Construction Intensity and Operations on Rural Freeway Work Zone Capacity written by Ronaldo Luna and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Capacity is affected by construction type and its intensity on adjacent open traffic lanes. The effect on capacity is a function of vehicles moving in and out of the closed lanes of the work zone, and the presence of heavy construction vehicles. Construction activity and its intensity, however, are not commonly considered in estimating capacity of a highway lane. The main purpose of this project was to attempt to quantify the effects of construction type and intensity (e.g. maintenance, rehabilitation, reconstruction, and milling) on work zone capacity. The objective of this project is to quantify the effects of construction type and its intensity on work zone capacity and to develop guidelines for MoDOT to estimate the specific operation type and intensity that will improve the traffic flow by reducing the traffic flow and queue length commonly associated with work zones. Despite the effort put into field data collection, the data collected did not show a full speed-flow chart therefore extracting a reliable capacity value was difficult. A statistical comparison between the capacity values found in this study using either methodologies indicates that there is an effect of construction activity on the values work zone capacity. It was found that the heavy construction activity reduces the capacity. It is very beneficial to conduct similar studies on the capacity of work zone with different lane closure barriers, which is also directly related to the type of work zone being short-term or long-term work zones. Also, the effect of different geometric and environmental characteristics of the roadway should be considered in future studies.
Book Synopsis Traffic Capacity Through Work Zones on Urban Freeways. Interim Report by : C. L. Dudek
Download or read book Traffic Capacity Through Work Zones on Urban Freeways. Interim Report written by C. L. Dudek and published by . This book was released on 1981 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Methodology to Estimate Work Zone Capacity on Freeway Lane Closures by : Ahmed-Zameem Kaja-Mohideen
Download or read book A Methodology to Estimate Work Zone Capacity on Freeway Lane Closures written by Ahmed-Zameem Kaja-Mohideen and published by . This book was released on 2003 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Intelligent Decision Support System for Work Zone Traffic Management and Planning by : Hojjat Adeli
Download or read book An Intelligent Decision Support System for Work Zone Traffic Management and Planning written by Hojjat Adeli and published by . This book was released on 2004 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Periodic resurfacing, rehabilitation, restoration, and reconstruction work is needed on the aging highway system to maintain a desired level of service for the traveling public. However, temporary work zones on highways disrupt the normal flow of traffic and reduce the level of service. Freeway work zones have become a major source of traffic congestion and travelers' delays which result in reduced freeway capacity, increased driver frustration, increased traffic accidents, increased road user delay cost, and increased fuel consumption and vehicle emissions. In this research, scientific models have been created for estimation of the work zone capacity for the first time. A case-based reasoning (CBR) model has been created for freeway work zone traffic management considering work zone layout, traffic demand, work characteristics, traffic control measures, and mobility impacts. A freeway work zone traffic delay and cost optimization model has been developed in terms of the length of the work zone segment and the starting time of the work zone using average hourly traffic data. An adaptive computational model has been created for estimating the work zone capacity and queue length and delay. A neuro-fuzzy logic model has been developed for estimation of the freeway work zone capacity taking into account 17 different factors impacting the work zone capacity. An object-oriented model has been developed for freeway work zone capacity and queue delay and length estimation. The model has been implemented into an interactive software system, called IntelliZone. IntelliZone's capacity estimation engine is based on pattern recognition and neural network models incorporating a large number of factors impacting the work zone capacity. This research provides the foundation for a new generation of advanced decision support systems for effective management of traffic at work zones. The extensive parametric study of main factors impacting the work zone capacity provides quantitative and objective results of value to work zone engineers and highway agencies when creating traffic management plans for work zones.
Book Synopsis Planning and Scheduling Work Zone Traffic Control by : Charles M. Abrams
Download or read book Planning and Scheduling Work Zone Traffic Control written by Charles M. Abrams and published by . This book was released on 1980 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Work Zones and Their Impact on User Costs by : Ghulam H. Bham
Download or read book Work Zones and Their Impact on User Costs written by Ghulam H. Bham and published by . This book was released on 1999 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report defines a work zone, its capacity, and how it is estimated. The importance of capacity is also mentioned since it is directly used in the calculation of user delay due to a work zone. The impact of delay on user costs is also discussed. A methodology is presented which relates queue delay with ADT. Queue delay due to a work zone is calculated using a plot between time, cumulative volume, and capacity. The area between the curves represents queue delay. Three software packages are evaluated for calculation of user delay and cost due to a work zone. None of them were adequate for calculating delay due to queue formation.
Book Synopsis Simulation-based Approach to Estimate the Capacity of a Temporary Freeway Work Zone Lane Closure by : Diego F. Arguea
Download or read book Simulation-based Approach to Estimate the Capacity of a Temporary Freeway Work Zone Lane Closure written by Diego F. Arguea and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: The Florida Department of Transportation (FDOT) is interested in updating its methodologies for estimating capacities on freeway work zones in Florida. The current methods have not been modified since 1995, and the FDOT is particularly interested in new ways to facilitate the scheduling and managing of lane closures. This thesis proposes new simulation-based models for estimating the capacity of a temporary freeway work zone lane closure. Some of the factors considered in model development include the location of the upstream warning sign, the presence of trucks, the presence of law enforcement and/or heavy equipment, and the length of the work zone. In addition to these inputs, the average speeds per vehicle and the vehicular lane distributions for specific network links were considered in model development. A large matrix of scenarios was created so that the effects of all combinations of factors could be observed. Data were collected from simulation of these scenarios using the software package CORSIM 5.1. Three lane closure configurations (2-to-1, 3-to-2, and 3-to-1) were simulated and one model for estimating capacity was developed for each. All models for each lane closure configuration consider the input factors named previously as well as average speeds per vehicle and lane distributions of vehicles upstream of the work zone lane closure. The final models show the effects of each of these factors on the throughput capacity of a freeway lane closure. A higher fraction of vehicles in the to-be closed lane(s) prior to the work zone leads to a significant decrease in capacity. Likewise, higher speeds in the to-be closed lane(s) also lead to a capacity decrease. The result of this simulation modeling offers valuable insights into the relative capacities under different geometric configurations and traffic stream scenarios. Future research is recommended to calibrate the models to actual field conditions.
Book Synopsis Planning and Scheduling Work Zone Traffic Control. Final Technical Report by : Charles M. Abrams
Download or read book Planning and Scheduling Work Zone Traffic Control. Final Technical Report written by Charles M. Abrams and published by . This book was released on 1980 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Interstate Highway Capacity for Short-term Work Zone Lane Closures by : Michael Markvan
Download or read book Evaluation of Interstate Highway Capacity for Short-term Work Zone Lane Closures written by Michael Markvan and published by . This book was released on 2005 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
