PATH

Development of Bus Rapid Transit Performance Assessment Guide Tool

Miller, Mark
Golub, Aaron
2010

This report describes the development process of the Bus Rapid Transit Performance AssessmentGuidebook (BRT PAG) Tool, which provides a decision support means for tool users to understand at a high level the benefits and costs associated with implementing bus rapid transit systems. The BRTPAG Tool is based on a conceptual framework consisting of BRT system strategies; stakeholder groupings; impacts of individual BRT system strategies; measurement methods used to analyze the impacts that BRT system strategies have on different stakeholders; and quantitative estimates of benefits and costs...

Improving Bay Area Rapid Transit (BART) District Connectivity and Access with the Segway Human Transporter and Other Low Speed Mobility Devices

Rodier, Caroline J.
Shaheen, Susan A.
Novick, Linda
2004

Access to transit stations is a significant barrier to transit use in many urban regions. Parking during peak hours is often limited, and many individuals are only willing to walk about a quarter mile to transit stations (Cervero, 2001). While there are some effective feeder services (e.g., shuttles) that help extend the range of transit access, these systems are limited because of fixed routes and schedules. A number of strategies have recently been implemented to improve transit access and transit use, including bicycles, electric bicycles, carsharing, and personal neighborhood electric...

Traffic Management System Performance Using Regression Analysis

Levinson, David
Chen, Wei
2006

This study can be viewed as a preliminary exploration of using regression analysis to evaluate long-run traffic management system performance. Four main traffic management systemsin the Twin Cities metro area --- Ramp Metering System, Variable Message Signs (VMS), Highway Helper Program, and High Occupancy Vehicle (HOV) System were evaluated based on multiple regression models. Link speed and incident rate were employed as the response variable separately. Consequently, regression analysis can be a simple and effective research method for testing the macroscopic association between traffic...

Traffic Data Measurement and Validation

Coifman, Benjamin
2001

Caltrans collects traffic data for many monitoring and control applications and the ultimate goal of the traffic surveillance system is to provide accurate data to these high level applications. The surveillance system includes data measurement, averaging and verification algorithms. This report presents improvements to many elements of the surveillance system. First, section 2addresses many shortcomings in average speed estimation at single loop detectors, as well as other sensors that estimate speed from average flow and occupancy. At the root of these problems is the fact that the...

Assessing the Benefits and Costs of ITS Projects: Volume 1 Methodology

Gillen, David
Li, Jianling
Dahlgren, Joy
Chang, Elva
1999

In this document a framework for evaluating ITS projects is developed. One of the central issues addressed is whether ITS projects are distinctly different from other more conventional transportation projects and thus the traditional decision methods such as Benefit-cost analysis cannot be used. The answer is mixed. The decision models used in the past are still relevant, however, these have been applied in an environment in which there was a well developed data base. The models identified, selected, assembled and evaluated data to make judgements as to whether the proposed projects were...

Vehicle Detection by Sensor Network Nodes

Ding, Jiagen
Cheung, Sing-Yiu
Tan, Chin-Woo
Varaiya, Pravin
2004

This report presents the algorithm development and experimental work of the sensor node signal processing for vehicle detection. The signals used for vehicle detection are acoustic and magnetic signals. The acoustic signals are characterized by short time FFT analysis and two acoustic vehicle detection algorithms are proposed: the Adaptive Threshold algorithm (ATA) and the Min-max algorithm (MMA). The ATA detects vehicle by searching for a sequence of 1's after slicing the acoustic energy curve using an adaptive threshold. The MMA detects vehicles by searching the local maximum in the...

Reduce Emissions and Improve Traffic Flow Through Collaborative Autonomy

April 30, 2024

Authors: Anthony D. Patire, Ph.D., Research and Development Engineer, PATH, University of California, Berkeley; Francois Dion, Ph.D., Research and Development Engineer, PATH, University of California, Berkeley; and Alexandre M. Bayen, Ph.D., Associate Provost for Moffett Field Program Development, University of California, Berkeley.

Abstract:

This report explores opportunities for employing autonomous driving technology to dampen stopandgo waves on freeways. If successful, it could...

Assessment of the Applicability of Cooperative Vehicle-Highway Automation Systems to Bus Transit and Intermodal Freight: Case Study Feasibility Analyses in the Metropolitan Chicago Region

Shladover, Steven E.
Miller, Mark A.
Yin, Yafeng
Balvanyos, Tunde
Bernheim, Lauren
Fishman, Stefanie R.
Amirouche, Farid
Mahmudi, Khurran T.
Gonzalez-Mohino, Pedro
Solomon, Joseph
Rawling, Gerald
Iris, Ariel
Bozic, Claire
2004

This report presents the results of its performance assessment of the feasibility of applying cooperative vehicle-highway automation systems (CVHAS) to bus transit and freight movements in the metropolitan Chicago area. Cooperative vehicle-highway automation systems are systems that provide driving control assistance or fully automated driving and are based on information about the vehicle's driving environment that can be received by communication from other vehicles or from the infrastructure, as well as from their own on-board sensors.

Health of California’s Loop Detector System

Rajagopal, Ram
Varaiya, Pravin
2007

The California Department of Transportation (Caltrans) freeway sensor network has two components: the sensor system of 25,000 inductive loop sensors grouped into 8,000 vehicle detector stations (VDS) and covering 30,500 freeway direction-miles; and the communication network over which the sensor measurements are transported to Caltrans Traffic Management Centers. The sensor network is virtually the only source of data for use in traffic operations, performance measurement, planning and traveler information. However, the value of these data is greatly reduced by the poor reliability of the...

TRICEPS: An ATMIS Field Implementation for Control and Evaluation: Final Report

McNally, M. G.
Rindt, C.
Logi, F.
2002

This report summarizes a comprehensive research project directed toward the development and implementation of an Advanced Transportation Management and Information System (ATMIS) as part of the Caltrans Advanced ATMIS Testbed Program at the Institute of Transportation Studies, University of California, Irvine. The primary goal of this project was to implement this prototype ATMIS, designated TRICEPS (Testbed Realtime Integrated Control and Evaluation Prototype System), in the Irvine sub-area of the Advanced Testbed network. This sub-area represents a well-defined freeway corridor with a...