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Custom Interface Builder Palettes For Advanced Driver Interface Rapid Prototyping

Moore, David W.
1993

This manual provides a brief introduction to four classes of software objects developed to help a user create and test interfaces using these objects in the Interface Builder application environment. The Knob, Dial, Alert Light, and Map object classes presented here represent the beginnings of a software library of virtual interface objects designed to support a rapid prototyping environment for advanced interfaces as described in "Rapid Prototyping of Advanced Driver Interface Systems."

Los Angeles Fot Spread Spectrum Radio Traffic Signal Interconnect Evaluation Task: Final Report On Full Deployment

Li, Victor O. K.
Sengodan, Senthil
Chan, Tat-keung Ken
Zhuge, Lei
1998

This report presents the results of an evaluation of project in which spread spectrum radio networks (SSRN) were used for traffic monitoring and control in the City of Los Angeles. The focus of SSRN is to reduce construction costs, construction time and future plant maintenance costs. A field operational test was conducted to test and evaluate the applicability of SSRN communications in traffic control.

Optimization Tools For Automated Vehicle Systems

Shiller, Zvi
1995

This work focuses on computing time-optimal maneuvers which might be used to develop strategies for emergency maneuvers and establishing the vehicle' s performance envelope. The problem of emergency maneuvers is addressed in the context of time optimal control. Time optimal trajectories are computed along specified paths for a nonlinear vehicle model, which considers both lateral and longitudinal motions.

A Method for Relating Type of Crash to Traffic Flow Characteristics on Urban Freeways

Golob, Thomas F.
Recker, Wilfred W.
2003

A method is developed to determine how crash characteristics are related to traffic flow conditions at the time of occurrence. Crashes are described in terms of the type and location of the collision, the number of vehicles involved, movements of these vehicles prior to collision, and severity. Traffic flow is characterized by central tendencies and variations of traffic flow and flow/occupancy for three different lanes at the time and place of the crash. The method involves nonlinear canonical correlation applied together with cluster analyses to identify traffic flow regimes with...

Institutional, Organizational and Market Aspects of Successful ITS Deployment: A Case Study Analysis

Conroy, Patrick
2003

This research follows on a previous study to explore key aspects of successful Intelligent Transportation Systems (ITS) deployment within existing institutional, organizational and market environments. The researcher developed three additional case studies of successful ITS deployment in the U.S. and Europe, and revisited one case from the previous work. Results from literature searches and surveys were analyzed, and findings on institutional, organizational and market factors are presented. Key words: ITS, deployment, institutional, value, business models, benefits, highway capacity

The Los Angeles Freeway Service Patrol (FSP) Evaluation: Site Selection and Database Development

Bertini, Robert
Petty, Karl
Skabardonis, Alexander
Varaiya, Pravin
1997

The Los Angeles Freeway Service Patrol (FSP) Evaluation project is measuring the effectiveness of the FSP program on a specific freeway site in Los Angeles. This report describes the site selection and database development phases of the project. From an initial list of ten possible sites, detailed analysis was performed in order to rank the sites according to specific parameters developed by the study team. Site selection was based on congestion levels, average travel speeds, shoulder width, number of in-lane FSP assists, average daily traffic, directionality and the density of functional...

Time Benefits of New Transportation Technologies: The Case of Highway Automation

Hall, Randolph W.
1991

This paper examines the role of travel time in the choice of transportation technologies. First, the components of travel time are introduced and compared among alternative modes. Next, a series of highway automation concepts is created, and the time benefits of each are discussed. Finally, the effects of automation on highway performance are modeled and evaluated, first looking at the space efficiency of highways, then measuring the benefits of increased capacity and increased velocity.The paper demonstrates that even simple forms of highway automation can provide important travel time...

TMDD Standards Review Technical Memorandum

Peterson, Brian
2021

This document presents a review of the Traffic Management Data Dictionary (TMDD) standard, specifically version 3.03d with some analysis of the newest version 3.1, released in January 2020. The intention of this document is to provide a review of this standard for transmission of data between traffic management centers (TMCs), with specific commentary on usability of the standard with specific examples based on its implementation in the Caltrans I-210 Connected Corridors program. TMDD is published by the Institute of Transportation Engineers (ITE), an international organization of...

Integrated Traffic and Communications Modeling Environment for ATMIS

Varaiya, P.
Walrand, J.
Wu, F.F.
Polydoros, A.
Sylvester, J.
1997

The aims of this MOU were to create an integrated environment for modeling traffic flow, sensor data, and the communications infrastructure for ATMIS. The research plan was to build separate tools for measuring the communications requirements of ATMIS traffic, modeling a mobile radio communications environment, and communications network design, and then to integrate them in an object-oriented environment from which one could also access existing or new road traffic simulation packages.Section 1 of the report presents a framework for estimating the vehicle-roadside communications...

Trav Info Evaluation: The Target Study Phase 1 Results

Koo, Ronald
Yim, Younbin
Hall, Randolph
1998

This paper discusses how traffic information is obtained and how the congestion of a major freeway affects travel behavior. Immediately following two congestion-causing major highway incidents south of San Francisco, telephone surveys were conducted of commuters who utilize the affected corridor of highway. The incidents took place two weeks apart on the same corridor of US-101, the first affecting southbound traffic and the second affecting northbound traffic. The travel behavior of commuters before and during their commute at the time of each incident was determined, including how they...