Travel Behavior

Mixed Manual/Semi-Automated Traffic: A Macroscopic Analysis

Bose, Arnab
Ioannou, Petros
2001

The use of advanced technologies and intelligence in vehicles and infrastructure could make the current highway transportation system much more efficient. Semi-automated vehicles with the capability of automatically following a vehicle in front as long as it is in the same lane and in the vicinity of the forward looking ranging sensor are expected to be deployed in the near future. Their penetration into the current manual traffic will give rise to mixed manual/semi-automated traffic. In this paper, we analyze the fundamental flow-density curve for mixed traffic using flow-density curves...

Integrated Ramp Metering Design and Evaluation Platform with Paramics

Chu, Lianyu
Recker, Will
Yu, Guizhen
2009

Ramp metering has been recognized as an effective freeway management strategy to either avoid or ameliorate freeway traffic congestion by limiting access to the freeway. California has applied ramp metering widely in major metropolitan areas. Currently, California has three major ramp metering systems: San Diego Ramp Metering System (SDRMS), Semi-Actuated Traffic Management System (SATMS), and Traffic Operations System (TOS). Although the ramp metering algorithms that underlay these systems are based on relatively simple theoretical concepts, these real-world ramp metering systems are...

Validation of Daganzo's Behavioral Theory of Multi-Lane Traffic Flow: Final Report

Banks, James H.
Amin, Mohammad R.
Cassidy, Michael
Chung, Koohong
2003

A study was conducted to verify C. F. Daganzo's behavioral theory of multi-lane traffic flow (1, 2). This study was conducted by teams from San Diego State University and the University of California at Berkeley who worked independently on a series of case studies to test predictions derived from the theory. The results of the study suggest that some of the phenomena predicted by Daganzo do occur, but not at all locations, and that the underlying behavioral assumptions are oversimplified. Specifically, the types of flow- density (or flow-occupancy) relationship assumed by Daganzo were...

Expedited Crash Investigation - With Use of Technologies for Documentation and Processing

Chan, Ching-Yao
Lian, Thang
Ko, Jeff
2007

The mobility and efficiency of California highways are impeded by the recurrent and non-recurrent congestion on a daily basis. Roadway incidents, especially collisions, often result in traffic congestion and travel delays. This project is initiated to explore the use of technologies that will potentially bring direct and immediate benefits to the law enforcement officers and other personnel who are involved in the handling of collision sites and subsequent investigations. The work carried out in this project includes three major components: (1) The experimentation of integrated vehicular...

Exploration Of Driver Route Choice With Advanced Traveler Information Using Neural Network Concepts

Yang, Hai
Kitamura, Ryuichi
Jovanis, Paul P.
Vaughn, Kenneth M.
Abdel-aty, Mohammed A.
Reddy, Prasuna Dvg
1993

A model of drivers' route choice behavior under advanced traveler information systems (ATIS) is developed based on data collected from learning experiments using interactive computer simulation. A neural network model is used as a convenient modeling technique in the analysis. Results indicated that most subjects made route choices based mainly on their recent experiences. Results also demonstrated that route choice behavior is related to the personal characteristics as well as the characteristics of the respective routes. Travel experiences had less effect on route choice and the results...

Using TRANUS to Construct a Land Use-Transportation-Emissions Model of Charlotte, North Carolina

Morton, BJ
Rodriguez, DA
Song, Y
Cho, EJ
2012

Integrated land use-transportation-emissions models are necessary to rigorously assess the potential of land use and transportation policies to reduce the vehicular emissions contributing to tropospheric ozone and to fine particulate matter. A theoretically- and empirically-grounded model contains these major components: data on economic sectors, population sectors, and intersectoral flows of commodities and labor; a transportation network; sectoral demands for land, predicting both the quantity and location demanded; elastic trip generation; transportation mode choice including non-...

Daily Activity and Multimodal Travel Planner: Phase II Final Report

Kitamura, Ryuichi
Chen, Cynthia
Chen, Jiayu
1999

It is important that our travel be organized in an efficient way. One way to achieve this is to provide travelers with a trip planner that produces efficient travel itineraries for them. It is desired that a trip planner possess the following features in order to be useful: be able to handle multiple destinations, multiple constraints, and multiple modes; and be able to adjust travelers' preferences under different circumstances. These features cannot be found in existing trip planners. The goal is then to develop an "Itinerary Planner" that possesses all of these features. The Itinerary...

The Relationship Between Urban Form and Station Boardings for Bogota’s BRT

Estupiñan, N
Rodriguez, DA
2008

Despite emerging evidence about the association between the built environment and travel behavior, the relationship between bus transit demand and urban form remains largely unexplored. By relying on primary and secondary data analyzed with a geographic information system, this paper examines the built environment characteristics related to stop-level ridership for Bogotá’s successful bus rapid transit system. After accounting experimentally and statistically for the simultaneity between transit supply, transit demand, and the built environment, we find evidence of the importance of...

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...

A Comparative Case Study on Active Transport To and From School

Fesperman, CE
Evenson, KR
Rodriguez, DA
Salvesen, D
2008

This study investigates active-transport-to-school initiatives through the Active Living by Design Community Action Model framework. The framework outlines five strategies that influence physical activity: preparation, promotion, programs, policies, and physical projects. A comparative case study was conducted to investigate active-transport-to-school initiatives at two North Carolina schools. A group of key stakeholders from each site was interviewed (N = 16), including principals, physical education teachers, public safety officers, city planners, regional transportation planners, city...