Infrastructure

Exploring Associations Between Physical Activity and Perceived and Objective Measures of the Built Environment

McGinn, AP
Evenson, KR
Herring, AH
Huston, SL
Rodriguez, DA
2007

The built environment may be responsible for making nonmotorized transportation inconvenient, resulting in declines in physical activity. However, few studies have assessed both the perceived and objectively measured environment in association with physical activity outcomes. The purpose of this study was to describe the associations between perceptions and objective measures of the built environment and their associations with leisure, walking, and transportation activity. Perception of the environment was assessed from responses to 1,270 telephone surveys conducted in Forsyth...

Development and Assessment of Selected Mobility Applications for VII: Principal Findings

Shladover, Steven E
Lu, Xiao-Yun
Nowakowski, Christopher
2011

This project has shown how connected vehicle systems, based on vehicle-vehicle and vehicle-infrastructure communication and coordination, can support the development of mobility-enhancing applications with the potential to transform the performance of the road transportation system. Three separate mobility-enhancing applications were developed, simulated, and tested, and their expected mobility benefits were estimated using simulations. Cooperative adaptive cruise control was shown to have a high potential for user acceptance, and when applied at the gap settings chosen by representative...

Commercial Motor Vehicle Inspection and Screening Stations: Evaluating Performance from the Perspective of Practitioners

Miller, Mark A.
Garefalakis, Antonios
2009

This report presents the findings of a study of commercial motor vehicle inspection and screening station practices with a focus on the use of various technologies to help address problems related to safety, security, roadway infrastructure, and air quality. A review of industry literature identified the various types of inspection and screening practices that have been and are being implemented including weight and size management, on-board equipment checking, driver-related violations and cargo monitoring, credential checking, and exhaust emissions monitoring. The review also identified...

Transit Service Integration Practices: An Assessment of U.S. Experiences

Miller, Mark A.
Englisher, Larry S.
Halvorsen, Rick
Kaplan, Bruce
2005

This report presents the results of its assessment of transit service integration practices in the United States. Initially, a review of the literature was performed that identified the various types of service integration policies that have been and are being implemented including infrastructure, schedule, information, fare payment and special events/emergency service integration. The review also revealed how the introduction of service integration practices is part of overall changes in transit properties' way of conducting business. The research then made use of a twostage survey of...

California Intersection Decision Support: A Driver-Centered Approach to Left-Turn Collision Avoidance System Design

Bougler, Bénédicte
Cody, Delphine
Nowakowski, Christopher
2008

Currently, Federal and State governments are partnering with private industries and academia institutions to pursue the deployment of intersection decision support (IDS) and cooperative intersection collision avoidance systems (CICAS), which seek to combine infrastructure-based and vehicle-based functions to provide optimal solutions for roadway users. The overall (IDS) research plan was constructed to explore the requirements, tradeoffs assessment, and technology investigations necessary to define a Cooperative Intersection Collision Avoidance System. This report is the third report on...

Multi-Channel Medium Access Control for Dedicated Short Range Communications

Mak, Tony K.
Laberteaux, Kenneth P.
Sengupta, Raja
Ergen, Mustafa
2006

This paper describes a medium access control (MAC) protocol to enable multi-channel operation for dedicated short range communication (DSRC). In particular, we focus on the challenge of supporting potentially high-bandwidth commercial or info-tainment communications between vehicle and roadside in hotspots over several service channels, while concurrently enabling time-critical vehicle-vehicle communication for safety in a separate channel. In our architecture, within hotspots, communication is aided by one of the access points in the hotspot. This access point is designated the...

CARTESIUS and CTNET - Integration and Field Operational Test

McNally, Michael G.
Rindt, Craig R.
2010

This report describes the conclusion of PATH Task Order 6324: CARTESIUS and CTNET---Field Operational Test. We describe the results of the multi-year project focused on integrating Caltrans primary signal management system, CTNET, with a major product from the Caltrans ATMS Testbed: the Coordinated Adaptive Real-Time Expert System for Incident management in Urban Systems, or more simply, CARTESIUS. The major products of this research include numerous software products for integrating CTNET with field devices, simulation software, with other traffic management systems in general, and with a...

EasyConnect II: Integrating Transportation, Information, and Energy Technologies at the Pleasant Hill BART Transit Oriented Development

Rodier, Caroline
Shaheen, Susan A.
Blake, Tagan
Lidicker, Jeffrey R.
Martin, Elliot
2010

Smart growth policy strategies attempt to control increasing auto travel, congestion, and vehicle emissions by redirecting new development into communities with a high-intensity mix of shopping, jobs, and housing that is served by high-quality modal alternatives to single occupant vehicles. The integration of innovative technologies with traditional modal options in transit-oriented developments (TODs) may be the key to providing the kind of high-quality transit service that can effectively compete with the automobile in suburban transit corridors. A major challenge, however, of such an...

Space Syntax and Walking in a New Urbanist and Suburban Neighbourhoods

Baran, PK
Rodriguez, DA
Khattak, AJ
2008

Prevailing measures of street design have largely ignored the relational properties between local and global street design as correlates of walking behaviour. This study contributes to understanding relationships between the syntactical properties of street design and walking behaviour by examining whether space syntax measures in New Urbanist and conventional suburban neighbourhoods are associated with the walking patterns of residents in these communities. Relying on geographic information systems, survey data and travel diaries, the study relates control, local integration and global...

ATIS -- Alternative Revenue Approaches

Yim, Y. B.
2001

As part of a continuing research on Advanced Traveler Information Systems (ATIS), this report presents an institutional analysis of alternative approaches to sustaining publicly supported ATIS. The fifteen largest metropolitan regions in the US and the private sector efforts were investigated through a literature review and in-person and telephone interviews. The study goals were to investigate alternative revenue approaches to achieve a self sustaining ATIS, identify institutional barriers to achieving self-sustainability, and develop a framework of assumptions. Two public sector...