Traffic Operations and Management

Neural Network Models For Automated Detection Of Non-recurring Congestion

Ritchie, Stephen G.
Cheu, Ruey L.
1993

This research addressed the first year of a proposed multi-year research effort that would investigate, assess, and develop neural network models from the field of artificial intelligence for automated detection of non- recurring congestion in integrated freeway and signalized surface street networks. In this research, spatial and temporal traffic patterns are recognized and classified by an artificial neural network.

Estimating ATIS Benefits For The Smart Corridor

Sengupta, Raja
Hongola, Bruce
1998

This report studies the effects of Advanced Traveler Information Systems (ATIS) on traffic congestion in the Smart Corridor of the Santa Monica Freeway. Simulation modeling is used to estimate the potential travel time savings to divert traffic from the Smart Corridor to arterial roads when incidents occur. The study attempts to establish relationships between traffic management variables, such as incident detection time, incident duration, capacity reduction, percentage of traffic diversion, and duration of traffic diversion.

Development of Hardware in the Loop Simulation and Paramics/VS-PLUS Integration

Dickey, Susan
Li, Meng
Yee, Jonathan
Zennaro, Marco
Liu, Henry X.
Ma, Wenteng
Liu, Hongchao
Chen, Shuaiyu
Lin, Wei-hua
Li, Lefei
2008

The report describes three research efforts carried out under a project titled “Development of Hardware-in-the-Loop (HiL) Simulation and Paramics/VS-PLUS Integration” sponsored by the California Department of Transportation (Caltrans) under Task Order 5311. The first effort developed and evaluated traffic signal optimization with Hardware-in-the-Loop Simulation (HiLS), using the NIATT Controller Interface Device (CID) manufactured by McCain Traffic Supply to provide real-time linkage between the Paramics microscopic simulation and a NEMA TS1 controller. An adaptive control system...

Field Testing of RFID for Parking Management

Huang, Michael
Zhang, Wei-bin
Novick, Linda
Johnston, Scott
Paul, Chris
Warner, Rick
2009

This report summarizes a field evaluation project involving investigation of the feasibility ofusing RFID technology to record vehicle and traveler activities at transit parking lots and at the station entrance. The report presents the field test results collected at a Bay Area Rapid Transit (BART) station, the analyses on the reliability RFID technologies for correlating parking events to station entries and observations on whether travelers accept RFID concept. The study concluded that, under certain design constraints, RFID can be utilized for parking management applications. The report...

Freeway Performance Measurement System (PeMS)

Chen, Chao
2003

The freeway Performance Measurement System (PeMS) collects real time traffic data from sensors and generates performance measures of vehicle miles traveled, hours traveled, and travel time. This project is sponsored by the California Department of Transportation (Caltrans). PeMS provides tools and reports for traffic planners, operators, and engineers. It has a Web interface. Growing traffic demand in metropolitan areas has far outpaced increases in freeway lane-miles in the United States. The solution to congestion lies in increasing the efficiency of existing infrastructure. Performance...

Evaluation of Portable Automated Data Collection Technologies: Interim Report, Work Accomplished During Fiscal Year 2005-2006

Banks, James H.
2006

This report documents work accomplished during Fiscal Year 2005-2006 as a part of a research project entitled “Evaluation of Portable Automated Data Collection Technologies.” Major activities during this period included a literature survey, surveys of potential users and vendors, preliminary evaluation of portable data collection technologies to select candidate systems for demonstration, and development of demonstration plans. There is demand for portable automated data collection systems for uses related to planning, traffic operations, traffic census, and traffic surveillance functions...

New Approach to Bottleneck Capacity Analysis: Final Report

Banks, James H.
2006

A capacity analysis approach intended as an alternative to the traditional Highway Capacity Manual (HCM) method was evaluated. One- and two-stage models of pre-queue and queue discharge flow (each of which might be thought of as representing “capacity” in some sense) were developed and compared with one another and the HCM method. Two-stage models related capacity flows to intervening variables, including average time gaps (average time separations between the rear of a vehicle and the front of one following it) in the critical lane (that with the highest flow rate) and the critical lane...

Evaluation of the ACC Vehicles in Mixed Traffic: Lane Change Effects and Sensitivity Analysis

Ioannou, Petros
Stefanovic, Margareta
2003

Almost every automobile company is producing vehicles with Adaptive Cruise Control (ACC) systems that allow a vehicle to do automatic vehicle following in the same lane. The ACC system is designed for driver comfort and safety and to operate with manually driven vehicles. These characteristics of ACC were found to have beneficial effects on the environment and traffic flow characteristics [1, 2, 3] by acting as filters of a wide class of traffic disturbances. It has been argue that the smooth response of ACC vehicles to high acceleration disturbances or large position errors creates large...

Highway Traffic Data Sensitivity Analysis

Lu, Xiao-Yun
Coifman, Benjamin
2007

This report is divided into two parts:•Part I - Highway Traffic Data Sensitivity Analysis in Systems Approach. This work has been conducted by Dr. Xiao-Yun Lu at California PATH, U. C. Berkeley.•Part II - Empirical and Analytical Results for Sensitivity to Loop Station Spacing. This work has been conducted by Benjamin Coifman in Civil Engineering, Ohio State University.Since the aspects of the problem considered and approaches adopted by the two are different, it is thus necessary to separate the report into two parts. Each part is self-content.

An Assessment of Opportunities for Bus Rapid Transit in the San Francisco Bay Area

Miller, Mark A.
2005

This report presents the findings from an investigation of opportunities to implement bus rapid transit systems in the San Francisco Bay Area with a focus on bus transit routes that travel on the state’s highway system. A primary component of this project has been the consideration of inter-connectivity and regional aspects of bus rapid transit systems deployment in the Bay Area. We examined approximately 200 bus transit routes in the Bay Area that lie on the state highway system from which five routes were identified as likely candidates for bus rapid transit implementation. Two of the...