Browsing by Author "Perrone, Eric"

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    Development of a Web Based Pavement Management Reporting System to Enhance the Virginia Department of Transportation Pavement Performance Monitoring Program
    Gerber, Aaron; Kanaan, Ahmad; Perrone, Eric; Chowdhury, Tanveer; Shekharan, Raja A. (2015-06-04)
    The Virginia Department of Transportation (VDOT) is the third largest state-maintained highway system in the nation. With such a significant taxpayer investment in road infrastructure, VDOT has embarked on a comprehensive pavement management process that includes the use of state of the art optimization analysis software to determine appropriate funding allocation of the pavement network. Since VDOT uses the results of the optimization analysis in determining their paving targets and for determining their funding allocations for the Districts, and because the final project selection is usually done at the District level, it is necessary to track how the scheduled Maintenance & Rehabilitation (M&R) projects being performed in the field align to the targets produced by the optimization analysis and it is also important to track the difference between the targeted, planned and actual performance of the network. This is not a simple process; this also requires an extensive coordination between the Central Office Pavement Management and the Districts. In this paper, the development of the VDOT Pavement Performance Monitoring Program is described. This Performance Monitoring Program consists of a set of programmed reports that link the VDOT PMS system and database with VDOT contracting system which gives the CO decision makers the ability to efficiently determine whether the funding allocations and performance targets are being met with the Districts project selection. This integration of the network level PMS analysis results with the Districts project selection allows VDOT to close the loop between project and network level pavement management.
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    Measures of Pavement Performance Must Consider the Road User
    Hudson, W. Ronald; Haas, Ralph; Perrone, Eric (2015-06-04)
    In 1960, Bill Carey and Paul Irick developed the Present Serviceability Index (PSI) as a user-based performance measure to define pavement quality and failure at the AASHO Road Test, a controlled load experiment that cost $300 million in 2014 dollars (1). The Canadians used the same approach in creating their Riding Comfort Index, but on a 0 to 10 scale. The PSI method was adopted and used worldwide to define pavement quality until the early 1990's when FHWA arbitrarily adopted International Roughness Index (IRI). It was intended as a measure of quality for HPMS (Highway Performance Monitoring System) data because IRI was touted to be standard and universal by the World Bank. PSI is still used by many agencies around the world but most state DOTs felt forced to follow FHWA and adopt IRI. The IRI is not standard state-to-state and more importantly the levels of "acceptability" and "failure," which must be set to define performance, vary from state-to-state. The US Federal MAP-21 requires state DOTs to do broader "performance" management and develop acceptable pavement performance measures (2). PSI is tied to road user response but IRI is not. This paper examines these indexes and how they derived. It contends that PSI can serve all levels of need while IRI does not, because it is not understood by highway users and legislators. PSI reflects human rider response and IRI does not close that gap.