Adapting to Urban Form The structure of a city—its urban form—shapes transportation networks for public transit, private vehicles and freight. Schemes to regulate access to various parts of the city can be created by exploiting technology and applying principles of physics. Typically, for non-commercial users, policy instruments include: variable, time-dependent traffic tolls that can change according to time and location, restrictions on vehicle access, and improved transit service to accommodate travelers who would have used cars. For freight users, solutions include “green logistics” and sustainable service systems that: consolidate freight delivery on the periphery of cities and grant special access privileges to vehicles operating in those centers. Lead Researchers: Carlos F. Daganzo, Professor of Civil and Environmental Engineering Email: daganzo@ce.berkeley.edu Home page: http://www.ce.berkeley.edu/Programs/Transportation/Daganzo/index.htm Michael Cassidy, Professor of Civil and Environmental Engineering Email: cassidy@ce.berkeley.edu Home page: http://www.ce.berkeley.edu/Programs/Transportation/Cassidy/ "The Nature of Urban Gridlock (Animation)," by Wang, A., Ong, O., Daganzo, C. F.,an interactive animation of traffic behavior and response to controls on a four-segment ring road. Recent Publications and Presentations (most recent first): 2010 S. Ilgin Guler and Mike Cassidy, Innovative Bus-Lane Deployments in Amman: Proposed Field Experiments, UCB-ITS-VWP-2010-10 Carlos F. Daganzo, On the Stability of Freeway Traffic, UCB-ITS-VWP-2010-9 Vikash V. Gayah and Carlos F. Daganzo, Clockwise Hysteresis Loops in the Macroscopic Fundamental Diagram, UCB-ITS-VWP-2010-8 Yiguang Xuan, Carlos F. Daganzo, and Michael J. Cassidy, Increasing the Capacity of Signalized Intersections with Separate Left Turn Phases, UCB-ITS-VWP-2010-6 Vikash V. Gayah and Carlos F. Daganzo, Exploring the Effect of Turning Maneuvers and Route Choice on a Simple Network, UCB-ITS-VWP-2010-5 Carlos F. Daganzo, Vikash V. Gayah and Eric J. Gonzales, Macroscopic Relations of Urban Traffic Variables: An Analysis of Instability, UCB-ITS-VWP-2010-4 Grembek Offer; and Carlos F. Daganzo, On the perceptibility of safety systems, UCB-ITS-VWP-2010-3 Guler, Ilgin and Michael Cassidy, Deploying Underutilized Bus Lanes at Key Nodes in a Road Network, UCB-ITS-VWP-2010-2 Anthony D. Patire and Michael J. Cassidy, A congestion mechanism for uphill expressways, the shoulder lane “release valve”, UCB-ITS-VWP-2010-1 2009 Daganzo, Carlos F., and Josh Pilachowski, "Reducing bunching with bus-to-bus cooperation." UCB-ITS-VWP-2009-12 Xuan,Yiguang, Vikash Gayah, Carlos Daganzo, and Michael Cassidy, "Multimodal Traffic at Isolated Intersections: New Management Strategies to Increase Capacity." UCB-ITS-VWP-2009-10 Daganzo, Carlos F., "Structure of Competitive Transit Networks." UCB-ITS-VWP-2009-6 Gonzales, Eric J., Celeste Chavis, Yuwei Li, and Carlos F. Daganzo, "Multimodal Transport Modeling for Nairobi, Kenya: Insights and Recommendations with an Evidence-Based Model." UCB-ITS-VWP-2009-5 2008 Daganzo, Carlos F., "How to Improve Bus Service." UCB-ITS-VWP-2008-6 Daganzo, Carlos F. and Nikolas Geroliminis, "An analytical approximation for the macropscopic fundamental diagram of urban traffic." VWP-2008-3 (432 K PDF). Gonzales, E. J., Geroliminis, N., and Daganzo, C.F. (2008), “Allocating City Space to Multiple Transportation Modes: A New Modeling Approach Consistent with the Physics of Transport”, Center for Future Urban Transport Working Paper UCB-ITS-VWP-2008-1, Institute of Transportation Studies, University of California, Berkeley; 2008 Daganzo, C. and Cassidy, M., Effects of high occupancy vehicle lanes an freeway congestion, Transportation Research (B) (in press) Geroliminis, N. and Daganzo, C.F., “Existence of Urban-Scale Macroscopic Fundamental Diagrams: Some Experimental Findings”, accepted by Transportation Research part B 2007 Geroliminis, N., and Carlos F. Daganzo, "Existence of urban-scale macroscopic fundamental diagrams: Some experimental findings" VWP-2007-5 (940 K PDF) Daganzo, C. F.; Yuwei Li; Eric J. Gonzales; Nikolas Geroliminis, "City-Scale Transport Modeling: An Approach for Nairobi, Kenya." VWP-2007-4. June 2007. Daganzo, C. F., "Urban Gridlock: macroscopic modeling and mitigation approaches," Transportation Research Part B 41, 49-62 ("Corrigendum" Transportation Research part B 41, 379). 2007. Menendez, M. and Carlos F. Daganzo, "Effects of HOV Lanes on Freeway Bottlenecks."Transportation Research Part B 41 (8) , 809-22. 2007. Daganzo, C.F. and Michael Cassidy, "Deploying Lanes for High Occupancy Vehicles in Urban Areas." VWP-2007-1.February 2007. Geroliminis, N. and Carlos F. Daganzo, "Macroscopic Modeling of traffic in cities," TRB 86th Annual Meeting, paper 07-0413. January 2007. 2006 Daganzo, Carlos F., "On the Variational Theory of Traffic Flow: Well-Posedness, Duality and Applications." Networks and Heterogeneous Media, Volume 1, 601-619. December 2006. Daganzo, C. F., "In traffic flow, cellular automata = kinematic waves," Transportation Research Part B 40, pp.396-403, June 2006. (Link to citation in Science Direct. Subscription required to view file.) Eichler, M. and C. F. Daganzo, "Bus Lanes with Intermittent Priority: Strategy, Formulae and an Evaluation." Transportation Research Part B 40, 731-744 (2006). Pilachowski, J. and C. F. Daganzo, Stability of Bus Routes (PPT. in html). Menendez, M. and Carlos F. Daganzo, "Effects of HOV Lanes on Freeway Bottlenecks." VWP-2006-3. September 2006. Daganzo, Carlos F. "On the Variational Theory of Traffic Flow: Well-Posedness, Duality and Applications." VWP-2006-2. June 2006. Menendez, M. "HOV Lanes: Their Impact on Traffic," Dept. of Civil and Environmental Engineering Ph.D. Thesis, 2006. Wang, A., Ong, O., Daganzo, C. F., Animation "The Nature of Urban Gridlock," an interactive animation of traffic behavior and response to controls on a four-segment ring road. 2005 Geroliminis, N., and Skabardonis, A. (2005), “Prediction of Arrival Profiles and Queue Lengths Along Arterials by Using Markov Decision Process,” Transportation Research Record No.1934, 2005. Geroliminis, N. and C. F. Daganzo, "A Review of Green Logistics Schemes Used in Cities around the World," VWP-2005-5. (348 K PDF) Presented at National Urban Freight Conference, Feb. 1-3, 2006, Long Beach, CA. Eichler, M. and C. F. Daganzo, "Bus Lanes with Intermittent Priority: Screening Formulae and an Evaluation," VWP-2005-2 (628 K PDF). August 2005. Eichler, M., "Bus Lanes with Intermittent Priority: Assessment and Design," City and Regional Planning Master's Thesis. Fall 2005 (2 MB PDF). Daganzo, C. F., "Improving City Mobility through Gridlock Control: an Approach and Some Ideas," VWP-2005-1 (412 K PDF). July 2005.