PATH

Using Cooperative Adaptive Cruise Control (CACC) to Form High-Performance Vehicle Streams. Definitions, Literature Review and Operational Concept Alternatives

Shladover, Steven E.
Nowakowski, Christopher
Lu, Xiao-Yun
2018

Cooperative Adaptive Cruise Control (CACC) is a term that has been used rather loosely in recent years, such that different people visualize different functions and capabilities when discussing CACC systems. Thus, there are now multiple system concepts that have been described under the CACC label, and the functionalities included in these varied concepts can be quite different from each other. At the heart of each CACC concept is the merging of Adaptive Cruise Control (ACC), a subset of the broader class of automated speed control systems, with acooperative element, such a Vehicle-to-...

Vehicle Navigation and Route Guidance Technologies: Push and Pull Factors Assessment

Ygnace, Jean-luc
Lavallee, Paul
Al-Deek, Haitham M.
1990

This study focusses on the development of navigation and route guidance technologies with an emphasis on existing systems, industrial strategies, market approach and human factors considerations. By considering the different situations in the US, Europe, and Japan the report analyzes the conditions under which one reasonably could assume a wide spread of these technologies with social and individual benefits.

Vehicle Lateral Control Under Fault in Front and/or Rear Sensors

Lu, Guang
Huang, Jihua
Tomizuka, Masayoshi
2003

This report documents the findings of research performed under TO4204, "Vehicle Lateral Control under Fault in Front and/or Rear Sensors" during the year 2000- 2001. The research goal of TO4204 is to develop vehicle lateral control strategies under faulty operation of the magnetometers. The main objectives of the project are: (1) to design controllers that use the output from only one set of magnetometers, and (2) to develop an autonomous lateral control scheme that uses no magnetometers. New controllers that use just the front magnetometers have been designed based on H1 optimal design...

Promoting Research Results and New Technologies: Making the Case for Accelerated Deployment

Andrews, Steven
Madanat, Samer
Ragland, David
West, Thomas
2011

Deploying innovations in transportation products and services to stage 5 of the product development process represents a growing challenge for the Caltrans division of research and innovation.

Evaluation of Automated Workzone Information System (AWIS) CHIPS (Computerized Highway Information Processing System)

Chu, Lianyu
Benouar, Hamed
Recker, Will
2005

Improved real-time automated motorist information around workzones can help relieve congestion and improve safety around those workzones. Several Automated Workzone Information Systems (AWIS) are being deployed around the nation. The California Department of Transportation (Caltrans) requested that The California Center for Innovative Transportation (CCIT) evaluate the Computerized Highway Information Processing System (CHIPS), which is an AWIS developed by ASTI Transportation Systems. The system is able to detect traffic congestion (using its traffic sensors) in the work zone area and...

Freeway Performance Measurement System (PeMS), PeMS 6: Final Report for CCIT TO 15

Varaiya, Pravin
2006

PeMS 6 is the latest of six task orders devoted to research, development, and maintenance of the PeMS system. PeMS collects, processes, stores, and makes available online data from eight Caltrans districts (D3, 4, 5, 6, 7, 8, 11, 12). The data are obtained from 22,067 loops1, grouped into 8,649 vehicle detector stations (VDS). These loops cover 3,154 out of 30,572 directional-miles of interstate and state highways in California. PeMS began as a research project. As the research system evolved, Caltrans determined that the information it provided was very valuable, and additional resources...

Corridor Management Plan Demonstration

Alm, Erik
2006

The Corridor Management Plan Demonstration (CMPD) aims to develop a template for corridor system management plans that can be used for both planning and operational analysis. The primary objective of CMPD is to improve traditional corridor management planning by incorporating detailed, multi-modal performance measurement and evaluation, and innovative micro-simulation modeling techniques. The template will help to address the problem of lost system productivity during congestion; it will alsohelp to create effective corridor management plans, thus improving statewide transportation...

Systems Engineering

CCIT
2006

This purpose of this research would be accomplished by documenting best practices in systems engineering for ITS projects and evaluate the benefit of the recommended Systems Engineering processes for ITS to other system development processes within the department. During the course of the TO 11 Evaluation project, the project teamconducted extensive communication and coordination with significant stakeholders at all levels, including thirteen Divisions, three Districts, key offices, and individual experts. Over 100 key project development documents were reviewed as well. Findings from the...

Freeway Performance Measurement System (PeMS), PeMS 6.5

Varaiya, Pravin
2006

PeMS 6.5 is the latest of seven task orders devoted to research, development, and maintenance of the PeMS system. While most PeMS research grants coincide with fiscal and academic years (July-June), this project started mid-year in response to a number of feature and maintenance requests (i.e. it was too late for Pe MS 6 and too soon for PeMS 7). PeMS collects, processes, stores, and makes available online data from nine Caltrans districts (03-8, 10-12). The data are obtained from 23,871 loops 1, grouped into 9,306 vehicle detector stations (VDS). These loops cover 3,495 out of 30,572...

Industry Forum on Travel Times

Margulici, J.D.
Mitman, Xander
So, Stella
2007

This document summarizes the work carried out by the California Center for InnovativeTransportation (CCIT) for the planning, implementation, and the closing phase of the Travel Time Industry Forum held in San Diego on December 14, 2005. It is broken up into three parts which describe, respectively, the three tasks laid out in CCIT's August 2005 Proposal to the Division of Research and Innovation of Caltrans:• Task 1: Programming and coordination• Task 2: Workshop logistics and delivery• Task 3: Analysis and recommendation