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Review of Asset Hierarchy Criticality Assessment and Risk Analysis Practices

The MTA NYC Transit (NYCT) has begun an enterprise-wide Asset Management Improvement Program (AMIP). In 2012, NYCT developed an executive-level concept of operations that defined a new asset management framework following a systems engineering approach. NYCT has recognized the need for a fully developed asset hierarchy to enable the evaluation of performance and cost at different levels within the agency. To that end, NYCT has initiated this project as one of the initial steps in better understanding the state of the art in asset management.


Possibility of Sidewall Collapse of Underground Structures due to Loss of Lateral Support under Internal Blast Loading

For some immersed tube tunnels, the horizontal slab contributes to the structural integrity. If a train running on the slab were subjected to an explosion, which then failed a large area of the horizontal slab, the sidewall might yield under the lateral earth and water pressures. In this study, a three-dimensional Finite Element (FE) model was established to analyze the problem. The dimension and structural characteristics of the model tunnel was taken from a published literature. Three different failure scenarios were analyzed to investigate the risk of side wall collapse.

A GIS-Based Performance Measurement System for Assessing Transportation Sustainability and Community Livability

Sustainability and livability in transportation, as the concepts referring to the capability of transportation systems to maintain the well being of our society, have been widely accepted as the critical principles to improve quality of life and health of communities. The research developed a GIS-based performance measurement system for assessing the roles of transportation in achieving these goals.

On-Road Energy Harvesting from Running Vehicles

A new type of large-scale on-road energy harvester to harness the energy on the road when traffic passes by is developed. When vehicles pass over the energy harvesting device, the electrical energy can be produced by the mechanical motion even after the vehicle passed by, which solves the difficulty in regeneration energy from impulse vibration. Design approach and dynamics modeling are presented to reveal the working mechanism of the energy conversion.

Real-time Dynamic Pricing for Bicycle Sharing Programs

This paper presents a new conceptual approach to improve the operational performance of public bike sharing systems using pricing schemes. Its methodological developments are accompanied by experimental analyses with bike demand data from Capital Bikeshare program of Washington, DC. An optimized price vector determines the incentive levels that can persuade system customers to take bicycles from, or park them at, neighboring stations so as to strategically minimize the number of unbalanced stations.

The Game-Theoretic National Interstate Economic Model: An Integrated Framework to Quantify the Economic Impacts of Cyber-terrorist Behavior

This study suggests an integrated framework to quantify cyber attack impacts on the U.S. airport security system. A cyber attack by terrorists on the U.S. involves complex strategic behavior by the terrorists because they could plan to invade an airport electronic system without any U.S. border or entry point. At the same time, any defending entity must consider the complex processes that may cause turmoil. The possibility of simultaneous threats from cyber attacks causes another difficulty for defending entities to secure their airports.

Verification/Development of Seismic Design Specifications for Downstate Zone

The New York City Department of Transportation (NYCDOT) Seismic Design Guidelines Report was updated in September 2008 by Weidlinger Associates to reflect current state-of-the-art knowledge. The NYCDOT seismic design guidelines are for use in the Downstate Zone which consists of New York City, Rockland County, Westchester County and Nassau County. NYSDOT has adopted the AASHTO LRFD Seismic Design Specifications for the Upstate Zone.

The Politics of Infrastructure Investment Decision-Making: Report of the Statistical Analysis of Selected Hypotheses

The objective of a statistical analysis of the politics of mega‐project decision‐making is to examine political and other project indicators and compare their impact on project decisions and performance. To our knowledge, no statistical analysis that establishes systematic political patterns across international, multi‐type transportation mega‐projects exists. Hence we developed an extensive database with relevant variables.

Determining Binder Flushing Causes in New York State

In 2007, a number of asphalt pavements in New York State flushed. An extensive forensic and laboratory investigation was conducted to determine why particular New York State asphalt pavements constructed in 2007 had undergone “atypical” flushing. Analysis of quality control records, laboratory characterization of field cores, and a laboratory mixture evaluation component were conducted to help best determine the potential reasoning for unexpected pavement flushing.

The Effects of Public-Private Partnerships on Traffice Safety: Evidence from Mexico

The use of public-private partnerships (PPPs) worldwide to facilitate private-sector participation in a variety of transportation infrastructure delivery tasks is growing. Tasks increasingly allocated to the private sector include the design, construction, operation, maintenance, and financing of large transportation facilities. Although academic literature on PPPs is burgeoning, there has been little empirical examination of the effects of private operation and maintenance of roads on road safety.

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