摘要: |
In the state of Wyoming, there are a total of 27,831 miles of roadway owned and maintained by
federal, state, and local entities. Approximately, 63 percent of these roads are maintained by
local governments. Approximately, 15 percent of these local government roads are paved while
the rest are unpaved.
According to Moving Ahead for Progress in the 21st Century Act (MAP-21), each state is
required to develop a Pavement Management System (PMS) to improve or preserve the present
pavement condition and the performance of the system (FHWA, 2014). All state departments of transportation (DOTs) already
have their own pavement management systems. The Wyoming Department of Transportation
(WYDOT) utilizes their PMS to maintain 6,844 miles of interstate and state highways. Currently,
there is no PMS or road maintenance database for the 63 percent of roads maintained by
Wyoming local governments. In a recent study by Huntington et al, 2013, a recommendation was
made to establish a pavement management system for local roads. This proposal concentrates on
establishing an optimization procedure for managing the 2,550 miles of county paved roads. The proposed PMS for county roads will be developed considering local
factors and traffic conditions which are significantly different from the state managed roadways
(Wolters, Zimmerman, Schattler, & Rietgraf, 2011).
Any PMS consists of two basic components: a comprehensive database and a set of tools or
methods that can assist decision makers in establishing cost effective strategies for evaluating
and maintaining pavements. The comprehensive database should contain current and historical
information on pavement condition, structure, and traffic. The set of tools or optimization
techniques will determine existing and future pavement conditions, predict financial needs, as
well as identify and prioritize pavement preservation projects. In 2014, WYDOT and the State
Transportation Innovation Council (STIC) funded a research project to develop a comprehensive
database for county paved roads. As part of that study, a comprehensive data collection effort
was conducted by the Wyoming T2/LTAP center to collect roadway inventory data, traffic
counts, roadway widths, pavement condition data and roadway thickness. This proposal seeks to
develop the second component of PMS which includes developing a set of tools to optimize the
conditions of county paved roads. |