Intelligent Transportation Systems

Cal Poly Pomona EDAPTS Test Deployment Procurement Documentation Package Version 7.0

Jia, Xudong, PhD
Gerfen, Jeff, PhD
2009

This report documents the Bronco Express EDAPTS System procurement process that follows the V-Model. The V-model process led the research team to have a clear understanding of expectations of what the procured system needed to do. It demonstrated a practical procurement and bidding methodology for small/medium transit agencies to acquire their own unique EDAPTS solutions.The procurement was conducted in two phases: 1) the pre-procurement evaluation and definition processes and 2) the Request for Proposal (RFP) process. In the pre-procurement process, the EDAPTS Operations Guidelines that...

Assessing Opportunities for Intelligent Transportation Systems in California's Passenger Intermodal Operations and Services

Miller, Mark A.
Loukakos, Dimitri
2001

This report presents the findings of its investigation into intermodal passenger transfer facilities' operations and services in urban areas of California and the opportunities for how the application of intelligent transportation systems may enhance such operations and services. The project was based initially on a macroscopic assessment of intermodal passenger transfer facility operations and services primarily by means of a review of the literature followed by a three-tier analysis through site visits, institutional aspects, and user views and opinions. Institutional aspects were...

ITS Band Roadside to Vehicle Communications in a Highway Setting

Dickey, Susan
Dulmage, Jared
Huang, Ching-Ling
Sengupta, Raja
2010

Researchers investigated the testing and evaluation of radio and communication protocol standards for the 5.9 GHz spectrum that has been approved by the Federal Communications Commission for exclusive transportation use. This spectrum allocation is intended for use as Dedicated Short Range Communications (DSRC) in the context of high-value Intelligent Transportation Systems (ITS) applications. In this report, we summarize the Wireless Access in a Vehicular Environment (WAVE) standardization effort for 5.9 GHz DSRC, its current status, and related issues of the IEEE 802.11p and IEEE 1609...

The Importance of Accurate Road Data for Spatial Applications in Public Health: Customizing a Road Network

Frizzelle, BG
Evenson, KR
Rodriguez, DA
Laraia, BA
2009

Health researchers have increasingly adopted the use of geographic information systems (GIS) for analyzing environments in which people live and how those environments affect health. One aspect of this research that is often overlooked is the quality and detail of the road data and whether or not it is appropriate for the scale of analysis. Many readily available road datasets, both public domain and commercial, contain positional errors or generalizations that may not be compatible with highly accurate geospatial locations. This study examined the accuracy, completeness, and currency of...

Identifying Walking Trips Using GPS Data

Cho, GH
Rodriguez, DA
Evenson, KR
2011

This study developed and tested algorithms to identify outdoor walking trips from portable global positioning system (GPS) units in free-living conditions. Methods: The study included a calibration and a validation phase. For the calibration phase, we determined the best algorithm from 35 person-days of data. Measures of agreement regarding the daily number and duration of diary-reported and GPS-identified trips were used. In the validation phase, the best algorithm was applied to an additional and separate 136 person-days of diary and GPS data. Results: The preferred algorithm in the...

Improving Estimates of Travel Activity and AIir Pollution Exposure Through Ubiquitous Sensing Technologies

Nazelle, A De
Seto, E
Donaire, D
Mendez, M
Matamala, J
Portella, M
Rodriguez, D
Nieuwenhuijsen, M
Jerrett, M
2011
Travel activity may have important influences on health, potentially contributing meaningfully to both physical activity (PA; walking and cycling) and inhaled air pollution. Ubiquitous sensing technology is a promising innovation to track locations of travel activity and associated levels of energy expenditure. We present results of a pilot study testing the use and performance of Calfit, a novel smart-phone based software that continuously records geo-positioning and PA estimated from an accelerometer integrated into Android cell-phone technology. Methods: We equipped 36 volunteers with an...

Out and About: Association of the Built Environment with Physical Activity Behaviors of Adolescent Females

Rodriguez, DA
Cho, GH
Evenson, KR
Conway, TL
Cohen, D
Ghosh-Dastidar, B
Pickrel, J
Veblen-Mortenson, S
Lytle, L
2012

Locational data, logged on portable GPS units and matched with accelerometer data, was used to examine associations of the built environment with physical activity and sedentary behaviors of adolescent females. In a sample of 293 adolescent females aged 15 to 18 years old in Minneapolis and San Diego, the built environment around each GPS point and its corresponding sedentary, light, and moderate-to-vigorous intensity physical activity was examined using random intercept multinomial logistic regression models. The odds of higher physical activity intensity (3-level outcome: sedentary...

Ten Strategies for Freeway Congestion Mitigation with Advanced Technologies

Daganzo, Carlos F.
Laval, Jorge
Munoz, Juan Carlos
2002

This report presents ten strategies for improving freeway performance that have become feasible with the advent of new software and hardware technologies for traffic control. Most of the strategies can be applied with advanced implementations of existing hardware. The strategies have in common that they can be rigorously tested. heir measures of performance can be reliably obtained and do not depend on the accuracy of data- hungry, large-scale models.

Longitudinal Control Development For IVHS Fully Automated And Semi-automated Systems: Phase II

Hedrick, J. K.
Garg, V.
Gerdes, J. C.
Maciuca, D. B.
Swaroop, D.
1996

This report studies performance issues in Automated Vehicle Control Systems (AVCS). Specifically, it addresses the automatic braking controller design issues, effects of braking on Intelligent Vehicle Highway Systems (IVHS) lane capacity, performance of platoons with various information structures, and fault detection filter design for AVCS.

Engaging the International Community: Research on Intelligent Transportation Systems (ITS) Applications to Improve Environmental Performance

Shladover, Steven
Barth, Matthew J
Zhang, Wei-Bin
2011

This project was proposed to build on the exposure that the authors of this report have had during the past two years to the thinking of the Japanese and European thought leaders about how Intelligent Transportation System (ITS) can contribute toward meeting environmental goals, especially for reducing CO2.