Documents
The Obu - Core Component Of GNSS Based Tolling Systems
The paper is outlining the problems which authorities and road operators are faced, e.g. congestion, high invest in road infrastructure, pollution,... Tolling is one way to solve or manage the problems. There are several systems for tolling. The state of the art technology is the GNSS Tolling system. The GNSS Tolling System consists of several components like e.g. backoffice, enforcement system, billing center,... The core component of the System is the On Board Unit (OBU) and its supplier. Being responsible for acquisition of the toll relevant data for every tolled vehicle and therewith for an income of billions of Euros, the OBU must fulfill some toll specific requirements. Lowering the invest for a tolling scheme is also possible, by using the OBU for providing value added services. This paper will give a good overview on what are the challenges for a reliable and flexible OBU and the suppliers.
Continental AG
Presented at the ITS America Annual Conference and Exposition, November 16-20, 2008, New York, New York
What’s Wrong with a Wireless Spread Spectrum Network for Traffic Management Systems
While the main buzz in ITS communications networks is for “more bandwidth” using
fiber optics, one City in California chose to upgrade their system based entirely on a
wireless network (spread spectrum) with Model 2070 controllers. While this wireless
technology has been around for some time now, designing such a system requires a lot of
initial background effort during the design, and flexibility on the part of the owning
agency. Issues such as repeater sites, copper-to-wireless interfaces, site and path
analysis, antenna separation distances and lengths of antenna cabling all need to be
considered during the design. This paper discusses the overview of that system and
describes the main challenges in designing and implementing a spread spectrum system
including some “best practices”.
DKS Associates
City of Camarillo
Presented at the ITS America Annual Conference and Exposition, April 26 - 28, 2004 San Antonio, Texas
Evaluation of the U.S. 395 Road–Weather ITS Systems: FY99 Federal Earmark, Spokane, Washington
This paper reports on the findings from an evaluation of a Fiscal Year 1999 rural federal earmark project. The project resulted in the deployment of new road-weather information systems in the northeastern section of Washington State. These systems included two RWIS stations, three cameras, two mobile Highway Advisory Radio (HAR) systems, and enhanced information posted on the Washington State Department of Transportation (WSDOT) web site. The purpose of the evaluation was to assess the mobility, safety, and maintenance and operations benefits from these rural ITS facilities. A particular focus was to assess the benefits experienced by Commercial Vehicle Operators (CVOs) and private travelers in a mountainous, rural setting during winter driving conditions, using telephone and Internet surveys. Potential efficiency and safety benefits were carefully examined with regard to WSDOT’s maintenance and operations in the study region, based on detailed weather event records and telephone interviews. This paper presents evaluation findings in the following five categories:
• Infrastructure operations and maintenance
• Travel and mobility for commercial vehicles
• Travel and mobility for public travelers
• System performance
• Safety
Battelle Memorial Institute
Meyer, Mohaddes Associates, Inc
Presented at the ITS America Annual Conference and Exposition, April 26 - 28, 2004 San Antonio, Texas
Reliable Wireless Traffic Signal Protocols for Smart Intersections
Electronic traffic signal has the advantage of being easily visible to machines. It is expected to augment the traditional traffic light system in future intelligent transportation environments, where intelligent vehicles interact with each other and with traffic systems and give informed advisories to the drivers.
Qingfeng Huang, Ronald Miller
Presented at the ITS America Annual Conference and Exposition, April 26 - 28, 2004 San Antonio, Texas
Institutional Factors In Developing Regional Architectures
The Southern California Priority Corridor was one of four such Corridors designated by
Congress as part of the 1991 Intermodal Surface Transportation Efficiency Act (ISTEA).
The Southern California Corridor consisted initially of the four counties along Interstate 5
from Highway 126 in Ventura County to the Mexican border. Later U.S. DOT added the
two Inland Empire counties of San Bernardino and Riverside to the Corridor. By 1996 the
Priority Corridor had adopted a technical architecture which formed the basis for the first
eight projects in what became known as the “Showcase” Program. Although five of the
eight Showcase projects have been delivered, several institutional issues have intervened to
significantly alter the regional landscape from the original Showcase vision. The more
important of these included the cessation of political support and dedicated funding for
Priority Corridors as a result of the TEA-21 transportation reauthorization act in 1998, the
U.S. DOT April 2001 Final Rule on regional ITS architectures, lack of stakeholder
agreement on operating and maintaining the Showcase architecture elements, lack of
funding for the Orange County and Inland Empire parts of the Showcase network and an
industry transition away from CORBA into a Web Services model for enterprise
architectures. These institutional issues have provided a useful “lessons learned” on how
even the best technical architectures can run afoul of various stakeholder management
perturbations. On the other hand, the technical advances from the completed projects have
provided a rich source of design experience. Much of this experience is reusable as the
Corridor transitions from its centralized CORBA architecture to a decentralized Web
Services architecture based on current industry best practices for enterprise connectivity
and information sharing.
Caltrans District 11
National Engineering Technology Corporation
Presented at the ITS America Annual Conference and Exposition, April 26 - 28, 2004 San Antonio, Texas