Intelligent Transportation Systems

Literature Review Report on Benefit/Cost Studies and Evaluations of Transit Management Systems

Jia, Xdong
Sullivan, Edward
2008

This study addresses the benefits and costs of Advanced Public Transportation Systems (APTS) applications in small and medium sized transit agencies using the research test implementation of a small transit oriented Intelligent Transportation System (ITS) on San Luis Obispo Transit as a case study. The Smart Transit System at San Luis Obispo is in a pre-commercialized state and implements the Efficient Development of Advanced Public Transportation Systems (EDAPTS) framework concept (Gerfen, 2001). The system has many potential benefits that will be identified and evaluated from a cost of...

Benchmarking Best Practices of Demand Responsive Transit Systems

Dessouky, Maged
Palmer, Kurt
Abdelmaguid, Tamer
2003

Over the past 10 years, operating expenses for Demand Responsive Transit have more than doubled as demand for this mandated service has expanded. Many advanced technologies and management practices have been proposed and implemented to improve the efficiency of the service; but, evidence for the effectiveness of these actions has been based upon projections or small pilot studies. We present the results of a nationwide study involving 62 large transit agencies and 13 small transit agencies. We evaluate the impact of implemented technologies and practices upon productivity and operating...

Organizing For Its: Computer Integrated Transportation Phase 2: Results For Emergency Operations

Lo, H.
Rybinski, H.
1996

This paper extends research on Computer Integrated Transportation (CIT) to emergency operations (EOs). The objectives of the study are to examine EOs in California, identify their role in gathering and using traffic incident information, establish the basis of coordination between EOs and TMCs, identify Intelligent Transportation Systems (ITS) services and technologies that may be beneficial to their operations, and finally compare and contrast similarities and differences between the California emergency operations and the emerging ITS National Architecture. This report covers the...

Feasibility of A Gyroscope-free Inertial Navigation System for Tracking Rigid Body Motion

Tan, Chin-Woo
Mostov, Kirill
Varaiya, Pravin
2000

We study the feasibility of designing an accelerometer-based gyroscope-free inertial navigation system (INS) that uses only accelerometers to compute the linear and angular motions of a rigid body.

A General Framework for Verification, Simulation and Implementation of Real-Time Control Algorithms

Eskafi, Farokh H.
1999

We have proposed, investigated, and implemented a general framework for the simulation, verication, and prototyping of control algorithms for intelligent vehicles and highways. The immediate use of such frame work will be in fault management project (MOU288). Prior to this project the protocols and control algorithms developed under MOU288 should have been manually verfied, translated to a simulation language for simulation, and then modified for the QNX real-time operating system for porting to the vehicle's computer. This manual translation process is error prone at every stage. Our...

Un Enfoque para la Integración de Dispositivos IoT en el Desarrollo de SIG en la Nube

Rodriguez, D
Rodríguez, J
Zúñiga, M
Solano, L
2017

Cloud computing and Internet of Things (IoT) as technological support to the construction of Geographic Information Systems (GIS) is changing the way these systems are developed and employed. The technological infrastructure provided by cloud providers and used as deployment platform enables GIS to take advantage of its storage and processing capabilities, whereas using IoT devices automate the data collection process. However, current implementations of GIS, whose services are used on cloud environments and interact with IoT devices, are realized in an ad hoc manner, without...

Microsimulation Approach to Investigate the Impact of Incorrect Automated Pedestrian Detection on the Operation of Signalized Intersections

Gavric, S
Erdagi, IG
Rodriguez, D
Stevanovic, A
2024
Numerous studies have assessed video detection systems, but automated pedestrian video detection systems (APVDS) have not received as much attention. Although some researchers have evaluated the accuracy of APVDS, none quantified the consequential effects that false or missed pedestrian calls have on critical vehicular and pedestrian performance metrics. To address this gap, this study introduces a microsimulation-based approach to analyze the impact of missed and false pedestrian calls on signalized intersection operation. This method employs simulation inputs that mimic various detection...

A Machine Vision Based Surveillance System For California Roads

Malik, J.
Russell, S.
1995

In this paper, the authors describe the successful combination of a low- level, vision-based surveillance system with a high-level, symbolic reasoner based on dynamic belief networks. This prototype system provides robust, high-level information about traffic scenes. The machine vision component of the system employs a correlation-based tracker and a physical motion model using a Kalman filter to extract vehicle trajectories over a sequence of traffic scene images. The symbolic reasoning component uses a dynamic belief network to make inferences about traffic events. In this paper, the...

A Machine Vision Based Surveillance System for California Roads

Malik, J.
Russell, S.
1995

In this report we address the problem of automation of heavy-duty vehicles. After a brief description of the dynamic model used in our design and simulations, we develop nonlinear controllers with adaptation, first for speed control and then for vehicle follower longitudinal control. We consider both autonomous operation as well as intervehicle communication, and evaluate the performance of our controllers in several different scenarios through simulation.

Wireless Token Ring Protocol

Lee, Duke
2001

The Wireless Token Ring Protocol (WTRP) is a medium access control protocol for wireless networks in Intelligent Transportation Systems. It supports quality of service in terms of bounded latency and reserved bandwidth. WTRP is efficient in the sense that it reduces the number of retransmissions due to collisions. It is fair in the sense that each station takes a turn to transmit and is forced to give up the right to transmit after transmitting for a specified amount of time. It is a distributed protocol that supports many topologies since not all stations need to be connected to each...