PATH

Model of Human Vehicle Driving- A Predictive Nonlinear Optimization Approach

Prokop, Günther
2000

When driving a vehicle the human acts as a controller in a highly dynamic environment. Thus human behavior in that control loop has to a large extent been described using control theoretical methodology. We develop a driver model, in which driving is seen as a model predictive control task in such away that the driver accumulates knowledge about his/her vehicle‘s handling properties. He/she builds a model out of that knowledge and uses it to predict the vehicle’s future reactions on his/her control inputs. The human’s behavioral optimization is reflected in the driver model by using that...

Automated Truck Platoon Control

Lu, Xiao-Yun
Shladover, Steven E.
2011

This report shows a successful application of 5.9 GHz DSRC with 100 ms update intervals to coordinate the automatic longitudinal control of a platoon of three Class 8 tractor-trailer trucks. The trucks were tested not only in constant-speed cruising conditions, but also through acceleration and deceleration profiles, up and down grades, and in platoon join and split maneuvers using the DSRC coordination. These tests showed acceptable vehicle following accuracy, ride quality and platoon stability. The gaps between the trucks were varied between 10 m and 4 m to evaluate the effects of...

Bay Area ATIS Testbed Plan

Khattak, Asad
Al-Deek, Haitham
Yim, Youngbin
Hall, Randolf
1992

Several factors have motivated the development of Intelligent Vehicle Highway Systems (IVHS); among them are growing traffic congestion, concern for environmental degradation, the need to improve safety, and the desire to best utilize existing transportation infrastructure. Within the framework of M-IS, Advanced Traveler Information Systems (ATIS) will provide historical, real-time and predictive information to support travel decisions. ATIS offers significant benefits interms of improving the travel experience of individuals and enhancing system performance. In the long-term, ATIS may...

Calibration of VISSIM for a Congested Freeway

Gomes, Gabriel
May, Adolf
Horowitz, Roberto
2004

A procedure for constructing and calibrating a detailed model of a freeway using VISSIM is presented and applied to a 15-mile stretch of I-210 West in Pasadena, California. This test site provides several challenges for microscopic modeling: an HOV lane with an intermittent barrier, a heavy freeway connector, 20 metered onramps with and without HOV bypass lanes, and three interacting bottlenecks. Field data used as input to the model was compiled from two separate sources: loop-detectors on the onramps and mainline (PeMS), and a manual survey of onramps and offramps. Gaps in both sources...

Multiple ICM Management: Task ID 3706 (65A0764), Final Report

Patire, Anthony PhD
Dion, Francis PhD
2022

In order to improve corridor network operations, the vision of integrated corridor management (ICM) is to identify corridor managers who serve as experts for individual corridors, and to enable these managers to oversee corridor operations, to coordinate with partner agencies, and to improve collaborative, multiagency planning. While it makes sense to manage freeways, arterials, and transit in a coordinated way within a corridor, it is less clear how multiple corridors interact with each other, and how incidents and response plans along one corridor impacts a nearby corridor or multiple...

Institutional Aspects of Multi-Agency Transit Operations

Miller, Mark A.
Lam, Amy
2003

In this project we have investigated the institutional changes that have been undertaken recently by transit properties to work more closely - in partnership and coordination rather than in competition - with other regional public agencies (especially including other transit properties) to help address mutual transportation problems from a regional and less parochial perspective. Our investigation includes case studies both within and outside of California. From the case studies, both formal and informal mechanisms are used to forge strong regional coordination linkages. Several key...

Commercial Vehicle Operations in Intermodal Transportation Management Centers

Hall, R.
Intihar, C.
1997

The report documents findings from a series of studies investigating the role of commercial vehicle operations within inter-modal transportation management centers. The study concludes that there exists no strong market push to better integrate motor carrier operations with governmental agencies in California today. As companies adopt ITS technologies for vehicle tracking and wireless communication, they are clearly not pushing for electronic transfer of information to and from governmental agencies. Likewise, none of the companies in the vehicle tracking industry has given priority to...

Fault Diagnosis and Safety Design of Automated Steering Controller and Electronic Control Unit (ECU) for Steering Actuator

Tan, Han-Shue
Bu, Fanping
Koo, Shiang-Lung
Zhang, Wei-Bin
2005

This final reports the fault analysis of precision docking system and safety design of the safety critical elements for precision docking system. The report includes three Parts, including:Part I provides a description of the Precision Docking System and reports analysis for fault diagnosis and safety design of automated steering controller and Electronic Control Unit (ECU) for steering actuator. It also reports a demonstration PATH conducted during the National Intelligent Vehicle Initiative demonstration organized by the US Department of Transportation Joint Program Office.Part II report...

Spectrum Needs for IVHS

Linnartz, Jean-paul M. G.
Walrand, Jean
1993

This report summarizes the need for (dedicated) radio spectrum for IVHS communication services. It concludes that, if efficient architectures can be developed, several MHz of spectrum will be needed for large-scale introduction of IVHS services. Compared to most other reported estimates of the spectrum requirements, this report gives a more detailed discussion of the relation between message volume (bit/sec), the required grade of service and spectral bandwidth (Hz).

Towards an Accessible City: Removing Functional Barriers to Independent Travel for Blind and Vision-Impaired Residents and Visitors

Golledge, Reginald G.
Marston, James R.
1999

This study examined the effect that use of Remote Infrared Signage Systems has on performance of blind or vision impaired people when undertaking a variety of bus user tasks, including finding a suburban bus stop, identifying a specific bus and boarding it, disembarking at the downtown terminal and finding the entrance, traversing the terminal and learning the location of facilities inside and simulating the exiting of a buss.