Commercial Operations

In this study, a valuation model was developed to assist in controlling illegal on-street parking. The
model determined the road sections in a road network where on-site regulation was placed so that the
total travel time could be minimized subject to a given number of regulated links. This regulation will
recover traffic capacity since the parking violator abandons parking or moves vehicle  to an unregulated
link. It  is natural to assume that the passage driver in the network changes route choice in response to the
changes in the travel time  brought by the  recovery of traffic capacity. Therefore,  the  route choice
behavior of the passage driver in response to the on-site regulation was expressed by the deterministic
user equilibrium (DUE).  In addition to that, parking road section choice behavior of the parking violator
in response to the regulation was also expressed in the model. The model formulated in this study was a
combinatorial optimization problem subject to the DUE condition. A numerical experiment was carried
out to demonstrate the results from the model. From the results, it was clarified that the continuity of road
sections with high capacities was the key property for selecting regulated ones.

Hokkaido University

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

This study developed a diagnosis process to assess the toll plaza operation and to develop the
strategies to operate toll booths  using predicted traffic data. The proposed system was applied
to an actual toll plaza currently in operation to test its applicability in real world. The analysis
results showed that the proposed diagnosis system could assess the defects in toll plaza
operation and provide the most appropriate operation alternative in terms of congestion
mitigation and operating cost reduction. It is expected that this result may shed light on other
possible applications in the world where the traffic environment is similar.

Myongji University

Korea Expressway Corporation

Ajou University

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

Many web-based traffic information systems can provide real-time traffic status, like
congestion status. Due to the limitation of the volume of real-time traffic data collected on
roads, the coverage of roads of traffic information provided is not so high. In this paper, we
present a new web-based traffic information system that provides more traffic information of
roads by using statistical data, and also realizes an accurate route search function. We
generated statistical data from accumulated historical traffic data, and implemented route
search function based on the combination of real-time data and statistical data. Compared
with systems without statistical data, this system increases the coverage of traffic information
on roads and provides more reasonable route searching result for users.

R&D Corporation

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

The paper will provide program background and discuss AASHTO’s perspectives and
actions relating to the VII effort. The paper will also share some of the early program
recommendations from the Executive Leadership Team.

American Association of State Highway and Transportation Officials

Presented at the 12th World Congress on Intelligent Transport Systems, November 6-10, 2005, San Francisco, California

Active Traffic Management (ATM) integrates the use of numerous traffic management and
Intelligent Transportation Systems (ITS) tools to manage traffic flow as a means to mitigate
traffic congestion under recurring and non-recurring conditions. These tools may include
dynamic lane assignment, variable speed limits, part-time utilization of shoulders as traffic
lanes, queue warning and contra-flow operations. ATM has most frequently been deployed in
Europe, as well as some bridges and tunnels in the U.S., but is increasingly being investigated
for U.S. freeway applications, both for permanent and work zone applications. Benefits
include reductions in accidents along with reduction in congestion due to optimization of
traffic flow. This paper provides a current overview of ATM applications in the U.S. and
abroad, as well as an overview of suggested next steps in ATM deployment.

HNTB Corporation

Paper submitted for publication and presentation at the ITS America’s 2009 Annual Meeting and Exposition