Personal Mobility

Presentation

Goal: Provide Pre-Trip Traffic Information for Arterials

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Federal Highway Administration

Presented at the ITS America Annual Conference and Exposition, April 29 –May 2, 2002 Long Beach, California

The ACAS integration of FCW and ACC stands to have a major influence on the driving process, from the viewpoint of safety, convenience, and traffic flow.

The ACAS FOT will study the naturalistic use of this sophisticated driver assistance technology in diverse traffic and road environments by laypersons.

By means of a massive program of subjective and objective measurements, an authoritative set of results and findings is expected.

University of Michigan Transportation Research Institute (UMTRI)

Presented at the ITS America Annual Conference and Exposition, April 29 –May 2, 2002 Long Beach, California

High quality transit service requires two feedback loops. The first loop, which works in real time, is operational control – taking measures to restore service to schedule. The second loop, which works off-line over a longer time frame, is service planning – making a schedule that reflects realistic operating conditions, is achievable, and allows for and expects interventions for operational control.

At the heart of both quality loops is a performance monitoring system based on an on-board computer with location tracking capability. It communicates in real time its location and deviation from schedule; for service planning, it records its trajectory during the day and uploads it at night into a database used for service planning.

This paper shows how service planning can be integrated with operational control using simple illustrations based on the systems that are in place in Eindhoven, the Netherlands. The operational control systems used there are holding at timepoints, and conditional priority at signalized intersections. Late buses request, and are given, priority, while early buses experience normal intersection delay, thus restoring service to its schedule. The analysis and planning system used is TRITAPT (TRIp Time Analysis in Public Transport), a program developed at the Delft University of Technology.

Delft University of Technology - Traffic and Transportation Research Laboratory

Northeastern University - Department of Civil and Environmental Engineering

Presented at the 10th ITS Annual Conference and Exposition, May 1-4, 2000 Boston, MA

The general architecture of the cognitive and control human driver model, which we are incorporating into SmartAHS1, is presented to allow simultaneous simulation of vehicles controlled by drivers and semi-automated systems. Among seven principal modules in the model, perception, tactical, and operational modules are investigated in more detail and are used to describe driving behavior in car following.

The tactical and operational modules consist of multiple layers, based on a hierarchical structure. They communicate to each other by means of flag, channel, and messages. In particular, a computational driving schema in the tactical module is designed by use of a finite state machine in order to deal with its hybrid structure. Moreover, the schema is chosen through a categorization process. A proposed regional decision map allows transition of states in the schema. Based on the perception module and decision in the tactical module, time gap control and range-rate control are used in the operational module to achieve a local goal for car following task.

The proposed modules have been implemented in the SmartAHS framework by use of SHIFT simulation language to perform the car following simulation. For the purpose of simulations, the design parameters for car following have been chosen through a literature review. However, they can be adjusted through real field test of a driver. This method permits to obtain realistic micro-level simulation results, and then, to describe an individual driving style.

University of California at Berkeley - California PATH

Department of Mechanical Engineering

Institute of Transportation Studies

Presented at the 10th ITS Annual Conference and Exposition, May 1-4, 2000 Boston, MA

Intelligent Transportation Systems (ITS) technologies can produce benefits to many groups of Americans. However, significant training and marketing campaigns are needed to be developed to attract older persons, who may not be familiar with available services, identify barriers and gaps in technology and techniques that can provide accessible transportation for the elderly. Research should identify functional limitations and special customer needs, and to suggest improvements to boost this service to this market and effective coordinate with the various agencies required and currently addressing the aging American transportation needs.

Oak Ridge National Laboratory

Presented at the 11th ITS Annual Conference and Exposition, June 4-7, 2001 Miami Beach, Florida