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Research Archive and Digital Asset Repository
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Oxford Brookes University: RADAR RADAR Research Archive and Digital Asset Repository Ward, S. (2017) 'Colin Buchanan's American Journey', Town Planning Review, 88 (2), pp. 201-231. DOI: https://doi.org/10.3828/tpr.2017.13 This document is the authors’ Accepted Manuscript. License: https://creativecommons.org/licenses/by-nc-nd/4.0 Available from RADAR: https://radar.brookes.ac.uk/radar/items/72ee92f0-fe9a-49fd-9b1d-7f86d6c61059/1/ Copyright © and Moral Rights are retained by the author(s) and/ or other copyright owners unless otherwise waved in a license stated or linked to above. A copy can be downloaded for personal non-commercial research or study, without prior permission or charge. This item cannot be reproduced or quoted extensively from without first obtaining permission in writing from the copyright holder(s). The content must not be changed in any way or sold commercially in any format or medium without the formal permission of the copyright holders. Colin Buchanan’s American Journey Stephen V. Ward School of the Built Environment Oxford Brookes University Headington Oxford OX3 OBP, UK [email protected] 1 Colin Buchanan’s American Journey Introduction In Autumn 1962, the British planner, Colin Buchanan, made an extensive eight-week tour of the United States. His purpose was professional and official, part of a major British government study to find appropriate planning responses to the long term problems of urban motor traffic. Buchanan’s intention was to learn and draw lessons from American experiences that could be applied to Britain, then becoming a mass motorised society. -
The Phenomenology of Gridlock
Cornell Law Library Scholarship@Cornell Law: A Digital Repository Cornell Law Faculty Publications Faculty Scholarship 6-2013 The heP nomenology of Gridlock Josh Chafetz Cornell Law School, [email protected] Follow this and additional works at: http://scholarship.law.cornell.edu/facpub Part of the Legislation Commons, and the Politics Commons Recommended Citation Chafetz, Josh, "The heP nomenology of Gridlock" (2013). Cornell Law Faculty Publications. Paper 586. http://scholarship.law.cornell.edu/facpub/586 This Article is brought to you for free and open access by the Faculty Scholarship at Scholarship@Cornell Law: A Digital Repository. It has been accepted for inclusion in Cornell Law Faculty Publications by an authorized administrator of Scholarship@Cornell Law: A Digital Repository. For more information, please contact [email protected]. SYMPOSIUM THE AMERICAN CONGRESS: LEGAL IMPLICATIONS OF GRIDLOCK THE PHENOMENOLOGY OF GRIDLOCK Josh Chafet4 Assertions that our legislative process is gridlocked-perhaps even "hopelessly" so-are endemic. So many more of our problems would be fixed, the thinking goes, if only our political institutions were functioning properly. The hunt for the causes of gridlock is therefore afoot. This Essay argues that this hunt is fundamentally misguided, because gridlock is not a phenomenon. Rather, gridlock is the absence of phenomena; it is the absence, that is, of legisla- tive action. Rather than asking why we experience gridlock, we should be asking why and how legislative action occurs. We should expect to see legislative action, the Essay argues, when there is sufficient public consensus for a specific course of action. "Sufficient," in this context, is determined with reference to ourspecific constitutionalstructure. -
Traffic Control Strategies for Congested Freeways and Work Zones
Technical Report Documentation Page 1. Report No. 2. Government Accession No. 3. Recipient's Catalog No. FHWA/TX-08/0-5326-2 4. Title and Subtitle 5. Report Date TRAFFIC CONTROL STRATEGIES FOR CONGESTED FREEWAYS November 2007 AND WORK ZONES Published: October 2008 6. Performing Organization Code 7. Author(s) 8. Performing Organization Report No. Geza Pesti, Poonam Wiles, Ruey Long (Kelvin) Cheu, Praprut Songchitruksa, Report 0-5326-2 Jeff Shelton, and Scott Cooner 9. Performing Organization Name and Address 10. Work Unit No. (TRAIS) Texas Transportation Institute The Texas A&M University System 11. Contract or Grant No. College Station, Texas 77843-3135 Project 0-5326 12. Sponsoring Agency Name and Address 13. Type of Report and Period Covered Texas Department of Transportation Technical Report: Research and Technology Implementation Office September 2005-August 2007 P. O. Box 5080 14. Sponsoring Agency Code Austin, Texas 78763-5080 15. Supplementary Notes Project performed in cooperation with the Texas Department of Transportation and the Federal Highway Administration. Project Title: Improved Techniques for Traffic Control for Freeways and Work Zones URL: http://tti.tamu.edu/documents/0-5326-2.pdf 16. Abstract 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. -
Impact of Highway Capacity and Induced Travel on Passenger Vehicle Use and Greenhouse Gas Emissions
Impact of Highway Capacity and Induced Travel on Passenger Vehicle Use and Greenhouse Gas Emissions Policy Brief Susan Handy, University of California, Davis Marlon G. Boarnet, University of Southern California September 30, 2014 Policy Brief: http://www.arb.ca.gov/cc/sb375/policies/hwycapacity/highway_capacity_brief.pdf Technical Background Document: http://www.arb.ca.gov/cc/sb375/policies/hwycapacity/highway_capacity_bkgd.pdf 9/30/2014 Policy Brief on the Impact of Highway Capacity and Induced Travel on Passenger Vehicle Use and Greenhouse Gas Emissions Susan Handy, University of California, Davis Marlon G. Boarnet, University of Southern California Policy Description Because stop-and-go traffic reduces fuel efficiency and increases greenhouse gas (GHG) emissions, strategies to reduce traffic congestion are sometimes proposed as effective ways to also reduce GHG emissions. Although transportation system management (TSM) strategies are one approach to alleviating traffic congestion,1 traffic congestion has traditionally been addressed through the expansion of roadway vehicle capacity, defined as the maximum possible number of vehicles passing a point on the roadway per hour. Capacity expansion can take the form of the construction of entirely new roadways, the addition of lanes to existing roadways, or the upgrade of existing highways to controlled-access freeways. One concern with this strategy is that the additional capacity may lead to additional vehicle travel. The basic economic principles of supply and demand explain this phenomenon: adding capacity decreases travel time, in effect lowering the “price” of driving; when prices go down, the quantity of driving goes up (Noland and Lem, 2002). An increase in vehicle miles traveled (VMT) attributable to increases in capacity is called “induced travel.” Any induced travel that occurs reduces the effectiveness of capacity expansion as a strategy for alleviating traffic congestion and offsets any reductions in GHG emissions that would result from reduced congestion. -
1 Towards a Third Generation of Global Governance Scholarship This Is the Final Typeset and Copyedited PDF Version. the Chapter
Towards a Third Generation of Global Governance Scholarship This is the final typeset and copyedited PDF version. The chapter should be cited as: David Coen and Tom Pegram, ‘Towards a Third Generation of Global Governance Scholarship’, Global Policy, Global Policy, Volume 9, Issue 1 (February 2018), 107-113. Abstract Global governance is widely viewed as in crisis. Deepening interdependence of cross-border activity belies the relative absence of governance mechanisms capable of effectively tackling major global policy challenges. Scholars have an important role to play in understanding blockages and ways through. A first generation of global governance research made visible an increasingly complex and globalising reality beyond the interstate domain. A varied second generation of scholarship, spanning diverse subfields, has built upon this ‘signpost scholarship’ to generate insight into efforts to manage, bypass and even – potentially – transcend multilateral gridlock to address pressing transboundary problems. This article plots a course towards a ‘third generation’ of global governance research, serving to also introduce a special section which brings together leading scholars in the field of global governance, working across theoretical, analytical and issue-area boundaries. This collaborative endeavour proposes to advance a convergence, already underway, across a theoretically and empirically rich existing scholarship, distinguished by a concern for the complexity of global policy delivery. 1 Introduction Although its conceptual, analytical and theoretical boundaries may be hotly debated, global governance is widely viewed as a vital component to addressing transboundary common goods challenges, from large-scale violence to sustainable development, health to climate change, bio-pathogen containment to financial disruption. As Martin Wolf (2012) of the Financial Times suggests, humanity’s efforts to overcome the tragedy of the global commons ‘could prove to be the defining story of the century’. -
Self-Organization and Self-Optimization of Traffic Flows on Freeways and in Urban Networks Prof
Self-Organization and Self-Optimization of Traffic Flows on Freeways and in Urban Networks Prof. Dr. rer. nat. Dirk Helbing Chair of Sociology, in particular of Modeling and Simulation www.soms.ethz.ch with Amin Mazloumian, Stefan Lämmer, Reik Donner, Johannes Höfener, Jan Siegmeier, ... © ETH Zürich | Dirk Helbing | Chair of Sociology, in particular of Modeling and Simulation | www.soms.ethz.ch Systemic Instability: Spontaneous Traffic Breakdowns Thanks to Yuki Sugiyama Capacity drop, when capacity is most needed! At high densities, free traffic flow is unstable: Despite best efforts, drivers fail to maintain speed © ETH Zürich | Dirk Helbing | Chair of Sociology, in particular of Modeling and Simulation | www.soms.ethz.ch The Intelligent-Driver Model (IDM) ► Equations of motion: ► Dynamic desired distance © ETH Zürich | Dirk Helbing | Chair of Sociology, in particular of Modeling and Simulation | www.soms.ethz.ch Instability of Traffic Flow © ETH Zürich | Dirk Helbing | Chair of Sociology, in particular of Modeling and Simulation | www.soms.ethz.ch Breakdown of Traffic due to a Supercritical Reduction of Traffic Flow © ETH Zürich | Dirk Helbing | Chair of Sociology, in particular of Modeling and Simulation | www.soms.ethz.ch Metastability of Traffic Flow © ETH Zürich | Dirk Helbing | Chair of Sociology, in particular of Modeling and Simulation | www.soms.ethz.ch Assumed Instability Diagram Grey areas = metastable regimes, where result depends on perturbation amplitude © ETH Zürich | Dirk Helbing | Chair of Sociology, in particular of Modeling and Simulation | www.soms.ethz.ch Phase Diagram of Traffic States and Universality Classes Phase diagram for small perturbations for large perturbations After: PRL (1999) Phase diagrams are not only important to understand the conditions under which certain traffic states emerge. -
Media and Gridlock
Media and Gridlock Daniel F. Stone1 9th Media Economics Workshop - New Economic School October 2011 1Oregon State University I Anecdotal evidence: minority party tried to block major new policy proposals (social security, health care reform, jobs bill?) I Term `gridlock' only coined after 1980 elections I Binder (1999): hard evidence of increasing gridlock in 80s and 90s (term coined in 80s) I Cloture motions way up over time, especially in last two Congresses Gridlock in U.S. appears to have increased in recent years I Term `gridlock' only coined after 1980 elections I Binder (1999): hard evidence of increasing gridlock in 80s and 90s (term coined in 80s) I Cloture motions way up over time, especially in last two Congresses Gridlock in U.S. appears to have increased in recent years I Anecdotal evidence: minority party tried to block major new policy proposals (social security, health care reform, jobs bill?) I Binder (1999): hard evidence of increasing gridlock in 80s and 90s (term coined in 80s) I Cloture motions way up over time, especially in last two Congresses Gridlock in U.S. appears to have increased in recent years I Anecdotal evidence: minority party tried to block major new policy proposals (social security, health care reform, jobs bill?) I Term `gridlock' only coined after 1980 elections I Cloture motions way up over time, especially in last two Congresses Gridlock in U.S. appears to have increased in recent years I Anecdotal evidence: minority party tried to block major new policy proposals (social security, health care reform, jobs bill?) I Term `gridlock' only coined after 1980 elections I Binder (1999): hard evidence of increasing gridlock in 80s and 90s (term coined in 80s) Gridlock in U.S. -
Increasing Highway Capacity Unlikely to Relieve Traffic Congestion
October 2015 Increasing Highway Capacity Unlikely to Relieve Traffic Congestion Susan Handy Department of Environmental Science and Policy Contact Information: University of California, Davis [email protected] Issue Reducing traffic congestion is often Increased roadway capacity induces proposed as a solution for improving fuel additional VMT in the short-run and even efficiency and reducing greenhouse gas more VMT in the long-run. A capacity (GHG) emissions. Traffic congestion has expansion of 10% is likely to increase VMT traditionally been addressed by adding by 3% to 6% in the short-run and 6% to additional roadway capacity via constructing 10% in the long-run. Increased capacity entirely new roadways, adding additional can lead to increased VMT in the short-run lanes to existing roadways, or upgrading in several ways: if people shift from other existing highways to controlled-access modes to driving, if drivers make longer freeways. Numerous studies have examined trips (by choosing longer routes and/or the effectiveness of this approach and more distant destinations), or if drivers 3,4,5 consistently show that adding capacity to make more frequent trips. Longer-term roadways fails to alleviate congestion for effects may also occur if households and long because it actually increases vehicle businesses move to more distant locations miles traveled (VMT). or if development patterns become more dispersed in response to the capacity An increase in VMT attributable to increases increase. One study concludes that the BRIEF in roadway -
Accessibility in Cities: Transport and Urban Form
NCE Cities – Paper 03 ACCESSIBILITY IN CITIES: TRANSPORT AND URBAN FORM Lead Authors: Philipp Rode and Graham Floater Contributing Authors: Nikolas Thomopoulos, James Docherty, Peter Schwinger, Anjali Mahendra, Wanli Fang LSE Cities Research Team: Bruno Friedel, Alexandra Gomes, Catarina Heeckt, Roxana Slavcheva The New Climate Economy Page CONTENTS The New Climate Economy (NCE) is the flagship project of the Global Commission on the Economy and Climate. It was established by seven countries, Colombia, Ethiopia, Indonesia, Norway, South Korea, Sweden and 1 INTRODUCTION 03 the United Kingdom, as an independent initiative to examine how countries can achieve economic growth while dealing with the risks posed by climate change. The NCE Cities Research Programme is led by LSE Cities at the 2 ACCESSIBILITY IN CITIES AND 04 London School of Economics. The programme includes a consortium of IMPLICATIONS FOR researchers from the Stockholm Environment Institute, the ESRC Centre CARBON EMISSIONS for Climate Change Economics and Policy, the World Resources Institute, Victoria Transport Policy Institute, and Oxford Economics. The NCE Cities Research Programme is directed by Graham Floater and Philipp Rode. 3 ASSESSMENT 11 4 PATTERNS, TRENDS AND 19 ABSTRACT TIPPING POINTS This paper focusses on one central aspect of urban 5 ACCESSIBILITY THROUGH 32 development: transport and urban form and how the two COMPACT CITIES shape the provision of access to people, goods and services, AND SUSTAINABLE TRANSPORT and information in cities. The more efficient this access, the greater the economic benefits through economies of scale, agglomeration effects and networking advantages. This 6 CONCLUSIONS 40 paper discusses how different urban accessibility pathways impact directly on other measures of human development BIBLIOGRAPHY 42 and environmental sustainability. -
Why Gridlock Matters
\\jciprod01\productn\N\NDL\88-5\NDL503.txt unknown Seq: 1 2-JUL-13 11:56 WHY GRIDLOCK MATTERS Michael J. Gerhardt* INTRODUCTION A week before the 2012 presidential election, I had the opportunity to speak with a former senator. I asked him about gridlock. I wondered what he would say to my law students who had lost hope in the legislative process because of the gridlock that defined the 112th Congress. He told me that they had good reason to have lost hope. He said that he conceived of the legislative process as a target; that the center of the target represented the areas that were most important to the country and the likeliest ones in which bipartisan agreement could be reached; and that the Patient Protection and Affordable Care Act (“ACA” or “Affordable Care Act”),1 in which he said that President Obama had invested so much time and capital, was on the periph- ery, if not the outside, of the target. He explained that the ACA exceeded the scope of congressional power. He explained that opposing the ACA should be the top priority of legislators and citizens. When I asked him what issues were at the center of the target, he initially did not respond. After I politely pressed him for an answer, he eventually said that there was nothing more important than opposing the health care bill. For him, gridlock had become a constitutional necessity. The former senator’s position on gridlock is hardly unique. Indeed, more than a year before President Obama’s re-election, Antonin Scalia, the longest serving justice on the current Supreme Court, told the Senate Judici- ary Committee that, “Americans should learn to love gridlock . -
How Partisan Gridlock in State Legislatures Encourages the Use of Citizen Initiatives
blogs.lse.ac.uk http://blogs.lse.ac.uk/usappblog/2015/11/23/how-partisan-gridlock-in-state-legislatures-encourages-the-use-of-citizen-initiatives/ How partisan gridlock in state legislatures encourages the use of citizen initiatives. While partisan gridlock has become a common occurrence in the US Congress, this is also often the case in many state legislatures. In new research, Frederick J. Boehmke, Tracy L. Osborn, and Emily U. Schilling look at one consequence of legislative rules that encourage legislative paralysis – the increasing use of ballot initiatives by citizens. Using data from the American states, they find that as ‘pivotal legislators’ – gatekeepers whose support is needed to overcome a legislative filibuster or gubernatorial veto – become ideologically farther away from the state’s median voter, initiative use increases due to those lawmakers thwarting legislative action to secure preferred outcomes in the form of ballot measures. In the early 20th century, Progressive reformers pushed for institutions of direct legislation, such as the initiative, referendum and recall, as a means to return power to the people and to place a check on elected officials. In this way, the direct initiative process in the American states offers a potential cure for legislative inaction. In the current era of increased legislative polarization and gridlock, such institutions may be more important than ever. In new research, we find that the initiative process can indeed provide an important alternate mechanism for making policy. Yet, the initiative process can potentially both hinder and encourage legislative obstructionism. We show that more burdensome hurdles for legislative action in the American states lead citizens to sponsor more ballot measures in order to alter policy outside the legislative arena. -
Mathematical Modelling of Traffic Flow on Highway
ISSN (Online) 2456 -1304 International Journal of Science, Engineering and Management (IJSEM) Vol 2, Issue 11, November 2017 Mathematical Modelling Of Traffic Flow on Highway [1] Venkatesha P., [2] Ajith.M, [3] Abhijith Patil, [4]Dhamini.T [1] Assistant Professor, [2][3][4] 1st Semester [1] Department of science and humanities Engineering,[2] Department of Computer Science Engineering, [3][4] Department of Electronics & Communication Engineering [1][2][3][4] Sri Sai Ram College of Engineering, Anekal, Bengaluru, India. Abstract:-- This paper intends a mathematical model for the study of traffic flow on the highways. This paper develops a discrete velocity mathematical model in spatially homogeneous conditions for vehicular traffic along a multilane road. The effect of the overall interactions of the vehicles along a given distance of the road was investigated. We also observed that the density of cars per mile affects the net rate of interaction between them. A mathematical macroscopic traffic flow model known as light hill, Whitham and Richards (LWR) model appended with a closure non-linear velocity-density relationship yielding a quasi-linear first order (hyperbolic) partial differential equation as an initial boundary value problem (IBVP) was considered. The traffic model IBVP is a finite difference method which leads to a first order explicit upwind by difference scheme was discretized. keywords:-- Mathematical modeling, traffic flow, Homogeneous conditions, Multilane road, Velocity-density, Quasi-linear first order (hyperbolic) partial differential equation, Finite difference method. I. INTRODUCTION II. HISTORY Attempts to produce a mathematical theory of traffic flow Mathematical modeling is the process of converting a date back to the 1920s, when Frank Knight first produced real-world problem into a mathematical problem and an analysis of traffic equilibrium, which was refined into solving them with certain circumstances and interpreting Wardrop’s first and second principles of equilibrium in 1 those solutions into real world.