Cross-cutting Issues

For the collection of traffic information using next-generation DSRC technology, the volume
of the probe data that can be collected, which shall represent the traffic behavior as a whole, is limited since the number of the probe car consists just a  limited portion of the whole traffic.
Hence, the method of data collection, allowing for the delay time in measurement and data
volume, shall be thoroughly examined in order to secure the accuracy of the traffic
information.  This paper describes the result of the study on the optimal  installation intervals
of beacon terminals.

Highway Industry Development Organization
7-17-1, Tsukiji, Chuo-ku, Tokyo 104-0045 Japan

Presented at the ITS America Annual Conference and Exposition,November 16-20, 2008, New York, New York

Smartway Project Advisory committee advocated measure for the concrete realization of
Smartway as a common infrastructure for the development of ITS in its second stage. In order
to provide various services, highly developed digital road maps will be required. This paper
describes two important points for developing a framework for road infrastructure information.
One is smooth updating of digital road  maps, and another is a  location-referencing standard.
An approach of smooth updating of large-scale digital road  maps is introduced. The  updating
method consists of data collection via electric delivery, and then CAD-GIS conversion. For
creating reliable data, manuals of completion drawing productions are also formulated. The
new data can be used to update existing road network data.  One of the problems is
inconsistency in positional coordinates between different road network data. F or  sharing
various related information on the network data,  a new concept of location-referencing
standard in road network data is proposed.

Research Center for Advanced Information Technology,
National Institute for Land and Infrastructure Management,
Ministry of Land, Infrastructure, Transport and Tourism
1 Asahi, Tsukuba, Ibaraki, 305-0804, Japan

Presented at the ITS America Annual Conference and Exposition,November 16-20, 2008, New York, New York

The Intelligent Transportation Systems (ITS) are the combination of many complex
engineering components, and they need the application of multidisciplinary investigations. An
adequate background for professionals to come means implies the knowledge acquisition in
various adjacent sciences and the skills in close teamworking. One of possible variants of
learning methodology to attain these ends is the creation of a virtual proving ground (VPG) to
study the diverse functional problems of ITS elements. The paper discusses the VPG concept
based on the integrated software environment, which addresses the in-depth training of
undergraduates and postgraduates in automotive engineering.

Technical University of Ilmenau

Presented at the ITS America Annual Conference and Exposition,November 16-20, 2008, New York, New York

Micro-simulation  modelling  of  road  networks  is  a  mature  technology,  but  as  with  any modelling  tool  there  is  continuous  work  to  ensure  that  the  correlation  between  model  and reality is high. The human factors of driver behaviour mean that there is always uncertainty in the traffic model, however, this paper shows how the uncertainty of the control strategy can be  eliminated  through  linking  the  micro-simulation  model  to  a  junction  controller  emulator. The  combination  allows  control  strategies  to  be  optimised  at  faster  than  real  time  operation and novel ideas and solutions to be assessed at the desk.

ROMANSE Traffic Control Centre

Presented at the ITS America Annual Conference and Exposition,November 16-20, 2008, New York, New York

During  the  last  decade,  in-vehicle  route  guidance  systems  have  known  a  significant  spread. These systems, apart from providing assistance to drivers, offer the chance to manage traffic in  such  a  way  that  allows  an  increase  in  road  network  capacity  and  therefore  a  decrease  in traffic congestion, without the high cost expansion of the road infrastructure. In this paper, we propose  the  application  of  the  basic  principles  of  the  Constrained  System  Optimal  model, used  to  solve  the  traffic  assignment  problem,  in  the  case  of  routing  a  single  vehicle.  In contrast to the User Optimal model that provides no traffic improvement  guarantees and the System Optimal model that is unrealistic, the Constrained System Optimal solution adopts the goal of reducing congestion and at the same time remaining fair for drivers when selecting a route.

University of Patras

Presented at the ITS America Annual Conference and Exposition,November 16-20, 2008, New York, New York