PATH

Evaluation of the Fuel-Efficient Traffic Signal Management (FETSIM) Program: 1983-1993

Skabardonis, Alexander
1994

This report presents the findings from the evaluation of a statewide initiative to retime traffic signals to produce more energy-efficient traffic flow: California's FuelEfficient Traffic Signal Management (FETSIM) Program. During the 11 years of the Program, over 160 cities and counties have retimed a total of 12,245 signals under grants from the FETSIM Program, in 334 projects. Improved timings have reduced vehicular delays by 14 percent in project areas; stops have been decre~sed by 13 percent. Overall travel times through these systems have dropped by 7 percent and fuel consumption has...

Thinking Outside the Bus: Understanding User Perceptions of Waiting and Transferring in Order to Increase Transit Use

Taylor, Brian D.
Iseki, Hiroyuki
Miller, Mark A.
Smart, Michael
2009

This report presents the results of its research of interconnectivity among transportation modes in California and the development of a methodology to evaluate connectivity performance, which could provide a new and needed tool to improve passenger transit trips. The two key products of this research are the transfer penalties/travel behavior conceptual framework, which was based on our review of the state-of-the-practice for evaluating intermodal and intramodal connectivity, and a preliminary transit connectivity assessment tool. The framework allowed us to consider various attributes of...

The Access Control Problem on Capacitated FIFO Networks with Unique O-D Paths is Hard

Erera, Alan L.
Daganzo, Carlos F.
Lovell, David J.
1999

This paper is concerned with the performance of multi-commodity capacitated networks with continuous flows in a deterministic but time-dependent environment. For a given time-dependent origin-destination (O-D) table, it asks if it is easy to find a way of regulating the input flows into the network so as to avoid queues from growing in it. It is shown that even if the network structure is very simple (unique O-D paths) finding a feasible regulation scheme is a `hard' problem. More specifically, it is shown that even if all input functions are smooth, there are instances of the problem with...

Assessment of the Applicability of Bus Rapid Transit on Conventional Highways—Case Study Feasibility Analyses Along the Lincoln Boulevard Corridor

Skabardonis, Alex
Miller, Mark A.
Li, Irene Yue
Cervero, Robert
Murakami, Jin
Zou, Zhijun
Richman, Neal
Wong, Norman
2009

This report presents the results of a performance assessment of the applicability of bus rapid transit on conventional highways in the setting of a site-specific case study along the Lincoln Boulevard corrider in Santa Monica, California. When bus rapid transit systems are implemented on conventional highways, especially on arterials, there are numerous bus priority treatments that can be applied and each has associated with it issues that need to be investigated. In this study, we are investigating concurrent flow curb bus lanes based on the removal of peak period parking along the...

Completing the Circle: Using Archived Operations Data to Better Link Decisions to Performance

Dahlgren, Joy
Garcia, Reinaldo C.
Turner, Shawn
2001

This report summarizes current practices in using archived operations data to better link decisions to transportationsystem performance. The joint research team of PATH and TTI investigated data archiving and performancemonitoring activities in selected locations, with a primary focus on the use of performance measures in improvingoperations. We first provide an overview of a traffic performance measures system and its components, then wesummarize the major findings for each system component. The major findings and conclusions of our research aresummarized below.

Freeway Performance Measurement System (PeMS) Version 4

Varaiya, Pravin
2004

PeMS 4 is the latest of four task orders devoted to research, development, and maintenance of the PeMS system. PeMS collects, processes, stores, and makes available online data from the six Caltrans districts (D3, 4, 7, 8, 11, 12), which include the major urban areas in California. The data are obtained from 23,237 loops, grouped into 7,359 vehicle detector stations (VDS). These loops cover 2,812 out of 30,726 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...

A Reliable Direct Drive for the Steering Wheel Column of Buses

Eirea, Gabriel
Sanders, Seth
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...

The Costs and Benefits of Home-Based Telecommuting

Shafizadeh, Kevan R.
Mokhtarian, Patricia L.
Niemeier, Debbie A.
Salomon, Ilan
2000

This report evaluates the costs and benefits of home-based telecommuting. Combining empirical data from the literature with a Monte Carlo simulation technique, a distribution of cost-benefit ratios is produced from three perspectives: the employer, the telecommuter, and the public sector.... Depending on the underlying assumptions, the results indicate that telecommuter benefit-cost ratios are generally above one if the employer bears the majority of the equipment cost burden. ...Even when parking and office space benefits are included, productivity lies at the heart of the telecommuting...

Models of Vehicular Collision: Development and Simulation with Emphasis on Safety V: MEDUSA: Theory, Examples, User's Manual, Programmer's Guide and Code

O'Reilly, Oliver M.
Papadopoulos, Panayiotis
Lo, Gwo-Jeng
Varadi, Peter C.
1999

This document constitutes a final report for MOU 39. It contains a User's Manual, Programmer's Guide, source code and underlying theory for the program MEDUSA. This program is capable of simulating both the normative driving dynamics and collision dynamics of an arbitrary number of vehicles. Its range of validity lies in the assumed nature of the vehicular collision, and it is recommended for use in studying low relative velocity impact scenarios at large time-scales. Keywords: IVHS America, Vehicle Dynamics, Collision Dynamics, Safety, computer Simluation, Animal and Simulation; A...

Safety Evaluation of Vehicle Following Operations by Fault Tree and Sensitivity Analysis

Chan, Ching-Yao
2000

This document is the final report for the project of MOU325 for the fiscal years of 1997- 2000, which is a continuation of MOU253 from the years of 1995-1997. The major accomplishments from this project can be categorized into the following two areas:(1) Development of fault tree models for safety evaluation of advanced vehicle(2) Utilization of an off-the-shelf fault tree tool to conduct fault tree analysis, such as control and safety systems. cutest generation and sensitivity studies.This research project utilizes commercially available software tools, CAFTA for Windows, to evaluate the...