Analytical And Simulation Models Of Weaving Area Operations Under Non Freeway Conditions
DOWNLOAD
Download Analytical And Simulation Models Of Weaving Area Operations Under Non Freeway Conditions PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Analytical And Simulation Models Of Weaving Area Operations Under Non Freeway Conditions book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Analytical And Simulation Models Of Weaving Area Operations Under Non Freeway Conditions
DOWNLOAD
Author : Muhammad Shahid Iqbal
language : en
Publisher:
Release Date : 1994
Analytical And Simulation Models Of Weaving Area Operations Under Non Freeway Conditions written by Muhammad Shahid Iqbal and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Roads categories.
The Highway Capacity Manual covers adequately the operation of weaving areas on freeways. Weaving on non-freeway facilities, however, has not been addressed as yet. This research effort presents a state-of-the-art procedural analytical approach and simulation models for the analysis of the level of service and operation of non-freeway weaving areas. Weaving under non-freeway conditions is classified into two broad categories; basic weave and ramp weave. The analytical models for these two weaving categories are calibrated and validated based on data obtained from several sites selected in the states of New Jersey and New York. New level of service criteria are developed for these two weaving categories. A FORTRAN program was developed to compute average weaving and nonweaving speeds and determine the level of service. In addition, simulation is used to develop a model for basic weave only. The simulation model is microscopic, enabling the user to study the dynamics of individual vehicles and the overall traffic flow.
Modeling Capacity
DOWNLOAD
Author : Sheida Khademi
language : en
Publisher:
Release Date : 2022
Modeling Capacity written by Sheida Khademi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with Express highway interchanges categories.
Systematic, well-designed research provides the most effective approach to the solution of many problems facing highway administrators and engineers. Traffic congestion on freeway systems is one significant concern in urban areas throughout the U.S.A. In this era, building new freeways to reduce congestion is less feasible due to the high capital and social costs. Thus, the effective management and operation of existing freeway facilities has become a preferred approach to reduce traffic congestion.A weaving section is a common design on major highway facilities that always has been an interest to researchers. Weaving areas are characterized by frequent lane changes, which significantly reduce the capacity of the freeway system. The HCM defined weaving capacity as "any combination of flows that causes the density to reach the LOS E/F boundary condition of 43 pc/m/ln for freeways" based on configuration, number of lanes in the weaving section, free-flow speed, length of the weave, and volume ratio (VR). Weaving sections are often problematic because of the increase in lane changing. These are common design elements on freeway facilities between an on ramp and off ramp with an auxiliary lane. They are located between merge and diverge points, near ramps where a lane is added or dropped, and at multilane ramps. A weaving section is a freeway segment in which traffic flows cross each other without traffic control (Minderhoud et al. 2003).Traffic demands exceeding segment capacity at weaving areas cause congestion, which affects the operation of the entire freeway section. Traffic operation problems often exist at weaving areas even when traffic demands are less than capacity and may be experienced at lower traffic flows because of the complexity of vehicle interactions, that is, increased lane changing, resulting in a degradation in level of service (LOS) and potential safety problems (Skabardonis et al. 2012).A significant amount of research has been done to estimate quality of service and capacity in weaving sections. However, little has been done to address multiple weaves. A multiple weaving area is one where two or more weaving areas overlap. No satisfactory means of estimating capacity has been found. Current procedures make assumptions about where weaving occurs in the individual weaving segments. A multiple weaving area is found when "a series of closely spaced merge and diverge areas create overlapping weaving movements (between different merge-diverge points)." (HCM 2016) This work examines capacity and quality of service conditions for a specific example of a multiple weave. Capacity is evaluated through micro-simulation by gradually raising flows for a range of geometric and fraction of weaving-traffic conditions. Models are developed to express capacity in terms of lane configuration, flow ratios, traffic mix (heavy traffic percentages), and overall flow rate. This study will be limited to cases where there are two overlapping weaving movements created by two entry ramps following by an exit ramp.The study will develop relations for capacity and service volume for a range of geometric, flow conditions, and traffic mix. Geometric conditions will include number of lanes on the main lane entry and each entrance ramp into and exit ramp from the weaving area (n), and distances (Ls) between ramps. Flow conditions will include a range of flows from each of the entry and exit roadways (V) in the multiple weaving area. The traffic mix represents the fraction of heavy vehicles in the traffic stream (PHV).In order to estimate the capacity of the weaving area, repeated simulations are performed under varying factors, number of lanes, flow range, heavy vehicle percentage, and routing. VISSIM outputs include link evaluation (average values for the link), and data collection (point measurement) files are extracted. These output files allow us to extract parameters, such as space mean speed for links, to identify the point at which speed start to drop. Also, entry and exit volumes to see if they are the same as the summation of input volume that we specified in the run. The poin tthat speed starts dropping significantly, or the summation of exit or entrance volume is much lower than what we entered in the system, suggests that we have reached the capacity point. VISSIM simulation runs are done using COM programming. This VISSIM scripting tool will enable the user to automate the analysis process. Using COM programming, this research has been able to performs many more simulation iterations than otherwise would have been possible in the same time period. Not only for the factors but also for the driving behavior parameters (following,lane change, and car following). To estimate capacity, we will consider all possible combinations of car following parameters to see what gives us the maximum capacity.At the same time, we will adjust different variables/factors we have introduced (number of lanes, flow, etc.) to see which one will give us a higher throughput, which is the capacity.This work's result will be presented to DOTs and MPOs as a guidebook. The file would be highly useful and money-saving for these agencies as they prefer to obtain higher capacity by managing existing freeways rather than buying rights of ways.
Development And Evaluation Of A Nfweav Simulation Model For Weaving Areas Under Non Freeway Condition
DOWNLOAD
Author : Wen-min Pan
language : en
Publisher:
Release Date : 1994
Development And Evaluation Of A Nfweav Simulation Model For Weaving Areas Under Non Freeway Condition written by Wen-min Pan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Roads categories.
Masters Theses In The Pure And Applied Sciences
DOWNLOAD
Author : Wade H. Shafer
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Masters Theses In The Pure And Applied Sciences written by Wade H. Shafer and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS)* at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dis semination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volumes were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 39 (thesis year 1994) a total of 13,953 thesis titles from 21 Canadian and 159 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this impor tant annual reference work. While Volume 39 reports theses submitted in 1994, on occasion, certain uni versities do report theses submitted in previous years but not reported at the time.
Operation Of Weaving Area Under Non Freeway Conditions Phase I Interim Report
DOWNLOAD
Author : Ahmad Sadegh
language : en
Publisher:
Release Date : 1991
Operation Of Weaving Area Under Non Freeway Conditions Phase I Interim Report written by Ahmad Sadegh and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Traffic flow categories.
One Sided Weaving Analysis On One Way Frontage Roads
DOWNLOAD
Author : Kay Fitzpatrick
language : en
Publisher:
Release Date : 1995
One Sided Weaving Analysis On One Way Frontage Roads written by Kay Fitzpatrick and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Frontage roads categories.
Over the past few years, there have been many studies concerning the effects of weaving on freeway operations; however, there have been few attempts to study the effects of weaving at "non-freeway" sites, such as freeway frontage roads. As part of a larger study that is developing a level of service evaluation procedure for freeway frontage roads, this report addresses the issues associated with one-sided weaving on one-way frontage roads. The objectives of this study were to develop a technique for evaluating one-sided weaving operations, and to develop recommendations on minimum and desirable ramp spacing. To meet these objectives, both field data and computer simulation were used. From the results of this study, the following three levels of service were defined: unconstrained (weaving volume 1500 vph), constrained (weaving volume from 1500 - 3000 vph), and undesirable (weaving volume 3000 vph). Concerning ramp spacing, the results revealed that it is desirable to have a weaving length greater than 300 meters with a minimium value of 200 meters
Efficient Transportation And Pavement Systems Characterization Mechanisms Simulation And Modeling
DOWNLOAD
Author : Imad L. Al-Qadi
language : en
Publisher: CRC Press
Release Date : 2008-11-01
Efficient Transportation And Pavement Systems Characterization Mechanisms Simulation And Modeling written by Imad L. Al-Qadi and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-11-01 with Technology & Engineering categories.
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
Federally Coordinated Program Of Highway Research Development And Technology Annual Progress Report Fiscal Year 1985
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1986
Federally Coordinated Program Of Highway Research Development And Technology Annual Progress Report Fiscal Year 1985 written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
Airport Curbside And Terminal Area Roadway Operations
DOWNLOAD
Author :
language : en
Publisher: Transportation Research Board
Release Date : 2010
Airport Curbside And Terminal Area Roadway Operations written by and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Technology & Engineering categories.
TRB's Airport Cooperative Research Program (ACRP) Report 40: Airport Curbside and Terminal Area Roadway Operations includes guidance on a cohesive approach to analyzing traffic operations on airport curbside and terminal area roadways. The report examines operational performance measures for airport curbside and terminal area roadway operations and reviews methods of estimating those performance measures. The report includes a quick analysis tool for curbside operations and low-speed roadway weaving area, highlights techniques for estimating traffic volumes, and presents common ways of addressing operational problems. Appendix A, Glossary, to ACRP Report 40 is included in the printed report. Appendices B through G, are available online.
Configuration And The Design And Analysis Of Weaving Sections
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1972
Configuration And The Design And Analysis Of Weaving Sections written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with categories.