Planning

Desarrollo Urbano Orientado Hacia Buses Rápidos: Lecciones y Perspectivas de Planificación con Base en Tres Ciudades Colombianas

Rodriguez, DA
Vergel-Tovar, C
Gakenheimer, R
2018

We studied the experience of five case studies in three Colombian cities (Bogotá, Pereira and Barranquilla) in the implementation of bus rapid transit- oriented urban development. Though cases reflect an unequal success, some lessons can be seen from the analysis. First is the active key role of municipal authorities in charge of planning. Second, the institutional complexity during the planning process for coordination between transport and land development investments, which has an impact on project success. Third, the tendency of the private sector to find opportunities for...

David Godschalk: A Planner’s Lifelong Search for the Sweet Spot

Berke, PR
Rodriguez, DA
2019

David R. Godschalk, professor emeritus in the Department of City and Regional Planning at the University of North Carolina, Chapel Hill, passed away in early 2018. In this essay we reflect on Dave’s planning scholarship and practice. We discuss his main contributions in 4 prominent areas. First is the importance of public participation and collaboration for the planning and governance of communities. He argued for democratizing and recasting public participation, with planners working alongside community members coproducing plans and incorporating uncertainty, new information, and...

Social (In) Equity in Access to Cycling Infrastructure: Examining the Distribution of Bike Lanes with Respect to Area-Level Sociodemographic Characteristics in 23 Large US Cities

Braun, L
Rodriguez, D
Gordon-Larsen, P
2019

Cycling advocates have recently argued that low-income and minority communities across the U.S. have disproportionately low access to bike lanes. To date, however, quantitative evidence of disparities in access to bike lanes has been limited to a small number of cities. We addressed this research gap by examining cross-sectional associations between bike lanes and sociodemographic characteristics at the block group level for 22 large U.S. cities (n = 21,843 block groups). Dependent variables included the presence (yes/no), coverage, connectivity, and proximity...

Bus Rapid Transit Impacts on Land Uses and Development Over Time in Bogotá and Quito

Rodriguez, Daniel
Vergel-Tovar, C.
2022

Despite the worldwide popularity of bus rapid transit (BRT), empirical evidence of its effects on land uses and development remains limited. This paper examines BRT’s impacts on land use and development in Bogotá and Quito, by using a parcel-level differencein-differences research design. We estimate a propensity score-weighted regression model of parcel development characteristics in treatment and control areas. In Bogotá, although parcels in close proximity to the BRT are subject to fewer changes in terms of development intensity (changes in built-up area) in relation to parcels in...

Marked Crosswalks, Station Area Built Environments, and Transit Ridership: Associations Between Changes in 877 US TOD Stations, 2010–2018

Li, M
Rodriguez, D
2024
Transit ridership across the US has experienced a decline over the past decade. Researchers, policy-makers and advocates have suggested that transportation and land use policies be modified to encourage transit-friendly environments. Despite the importance of studying the relationship between built environment and transit use, previous research on this topic exhibits several limitations in terms of scope, resolution and robustness of research design, due to availability of built environment and ridership data. Using a historical marked crosswalk dataset generated from Google Street View along...

Cooperative Intersection Collision Avoidance System (CICAS): Signalized Left Turn Assist and Traffic Signal Adaptation

Misener, Jim
Barnes, M.
Chan, Ching-Yao
Cody, Delphine
Dickey, Susan
Goodsell, R.
Gordon, Tim
Kim, Zu Whan
Kuhn, Tom
Lian, Thang
Nelson, David
Nowakowski, Christopher
Nubukawa, K.
Sharafsaleh, Ashkan
Shladover, Steven
Spring, John
VanderWerf, Joel
Zhang, Wei-Bin
Zhang, Liping
Zhou, Kun
2010

The Cooperative Intersection Collision Avoidance (CICAS) program is a multi-year, cooperative research program including federal, state, academic, and industry partners. The goal of the research program is to use ITS technologies to address the problem of intersection crashes. The program is funded through an 80/20 cost share, typically split between the U.S. Department of Transportation (D.O.T.) and a local state D.O.T. The program began in 2003, and has been divided into three functional segments based on crash type. The largest programmatic segment is CICAS-V (Violation) which is led by...

A Planning Methodology For Intelligent Urban Transportation Systems

Kanafani, Adib
Khattak, Asad
Crotty, Melanie
Dahlgren, Joy
1992

This report deals with an introduction to the control aspect of platoon maneuvers in Automated Highway Systems. The different platoon maneuvers include lane changes, merge procedures and split procedures. The first part of the report consists of a review of the existing literature in this area. The survey is split up into the quasi-synchronous and vehicle follower controller methods of approach to the problem. The subsequent sections deal with the mathematical description of the problem with two representations of the system under study, varying only in level of model complexity. The...

Tools for Operations Planning (TOPL2)

Varaiya, Pravin
2009

TOPL is a suite of tools to specify operational improvements including ramp metering, incident and demand management, auxiliary lanes, traveler information, and to quickly estimate the benefits that such improvements can realize. TOPL is based on the macroscopic cell transmission model (CTM). Advances under TOPL2 can be classified under (1) theory, (2) software and algorithms, and (3) applications.In terms of theory, the CTM model for a freeway was thoroughly analyzed and extended to arterials. In software, the major advance was the development of Aurora—an object-oriented simulation...

Planning the Development of a Commercial Motor Vehicle Virtual Weigh Station Technology Testbed

Miller, Mark A.
Sharafsaleh, Ashkan
2010

This report describes the issues associated with planning the development of a technology testbed for Virtual Weigh Stations in California. These issues may be organized into the following categories: system design and architecture, operational environment, siting & location, data collection, functional requirements and options, technology requirements and options, identification  of  stakeholders,  operational  testing  and  evaluation  (operational  scenarios,  performance measures, benefits &amp...

A Combined Quantitative and Qualitative Approach to Planning for Improved Intermodal Connectivity at California Airports

Lu, Xiao-Yun
Gosling, Geoffrey D.
Ceder, Avi
Tung, Steven
Tso, Kristin
Shladover, Steven
Xiong, Jing
Yoon, Sangwon
2009

This report has been prepared as the final deliverable for a research project developing a combined quantitative and qualitative approach to planning for improved intermodal connectivity at California airports. The quantitative approach involves the development of an Intermodal Airport Ground Access Planning Tool (IAPT) that combines transportation system performance measurement, an air passenger mode choice model, and a model of transportation provider behavior, and is designed to interface with a traffic network analysis model. The qualitative approach is used to enhance the quantitative...