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Pavement Notebook

The Pavement Notebook is a series of reports about the performance of the Washington State pavement network.  The reports are designed to be informative and accessible to the Governor, Legislators and the public.  If you have questions or comments, or are interested in more detailed data or data in other formats, please contact the WSPMS Administrator at (360) 709-5473 or .

Economic Evaluation of Pavement Management Decisions (750 kb)

The Washington State DOT (WSDOT) was an early pioneer in the implementation of pavement management, starting with pavement condition data collection in 1969, and the establishment of a computerized pavement management system in the late 1970’s. WSDOT performs a Life Cycle Cost Analysis (LCCA) for all new pavement structures, and existing pavements requiring reconstruction. A 50-year analysis period is used to consider all maintenance and/or rehabilitation activities anticipated over the life cycle analysis period. The LCCA performed when selecting a pavement type for a new pavement structure is a long-term analysis, based upon the best available information at the time the decision is made. But, it is not an operating plan that lays out the pavement treatment decisions for the next 50 years. The focus of this paper is the economic evaluation of pavement management decisions made in year-to-year operations, which are based on analyses at the performance period level. The use of economic evaluation techniques such as Cost Effectiveness Analysis, Replacement Analysis, and Break-Even Analysis is essential in making pavement management decisions, and can result in substantial cost savings. Even a one-year extension in pavement life through the use of cost-effective pavement treatments can have significant benefits. The information provided by the economic performance measures are shown to be critical for the efficient planning, prioritizing, and programming of pavement asset management activities.

Last Updated: 2/10/2015

Visualizing Pavement Management Data at the Project Level (2,259 kb)

As a Pavement Management System increases in maturity, so does the amount of information powering it. As the level of information grows, efficiently communicating the data becomes difficult. The Washington State Department of Transportation (WSDOT) has a long history of collecting and storing data that is electronically accessible and referenced against a Linear Referencing System (LRS). This data includes pavement surveys, contracts , capital projects, roadway configuration, maintenance activities, and more. This data has been successfully integrated from its many sources into the Washington State Pavement Management System (WSPMS). Data visualization is a key tool to utilize this vast amount of information when making pavement management decisions at the project, network and strategic levels. Commonly recommended data visualization techniques, such as bar charts, pie charts and GIS maps, lend themselves well to network and strategic analysis, but are difficult for efficient use at the project level. This paper provides an overview of the implementation and advantages of the Segment Viewer, the primary tool used for project level analysis in the web-based WSPMS software.

Last Updated: 2/9/2015

TRB 14-3468 - Evaluation of Maintenance Effectiveness for WSDOT (608 kb)

Any economical extension of pavement service life has a significant benefit for long-term life-cycle costs. Pavement maintenance activities can substantially extend the pavement service life or keep it from prematurely failing. The simple concept of higher costs due to deferred maintenance becomes more complicated when the objective is quantifying the cost tradeoffs, and selecting among maintenance alternatives. Current budget constraints in Washington State necessitate the development of new strategies with regard to pavement maintenance and preservation. Even if the optimum long-term rehabilitation plan for a particular section of roadway calls for a rehabilitation project, there may not be funds available to program the construction. This situation has resulted in the development of maintenance strategies for the purpose of delaying or avoiding pavement rehabilitation spending. These strategies include: (1) addressing early distress, (2) correcting short distressed sections, (3) maintaining and “holding” sections that are currently due for rehabilitation, and (4) integrating maintenance with rehabilitation strategies. The focus of this paper is to evaluate the cost-effectiveness of different pavement maintenance strategies, and improve the procedures for analyzing maintenance tradeoffs. To illustrate the impacts of the maintenance strategy on a network level, three pavement preservation alternatives are compared, and prospective costs are estimated for the Washington State highway network.

Last Updated: 1/2/2014

TRB 14-2716 - Modeling and Analyzing Budget Constrained Pavement Preservation Strategies (TRB Publication Index)

The Washington State Pavement Management System (WSPMS) has a long and well known history of describing network condition, predicting necessary rehabilitation and guiding the Washington State Department of Transportation (WSDOT) to the best possible value for pavements meeting an acceptable Level of Service (LOS). By definition, Lowest Life Cycle Cost (LLCC) is the most economical way to manage roadways to a required LOS. What does an Agency do when it is currently, and projected to be, funded at less than half of what LLCC calculations recommend? This is a deceptively difficult question and the situation WSDOT currently faces with its preservation budget. To assist the agency in answering this question, a Forecaster has been developed within the WSPMS that allows definition of a Forecast Scenario that allows the user to define yearly budget with optional allocations, preservation techniques, prioritization of roadways and activities, and more, and analyzes the results of the forecast using several different performance measures. This paper provides an overview of (a) the new WSPMS tool to create forecasts, (b) a general overview of the forecast process, and (c) the performance measures WSPMS presents for users to analyze the results of a forecast. Finally, several funding scenarios are compared by the expected performance measure outcomes and a specific prioritization methodology is recommended for the severely constrained WSDOT preservation budget.

Last Updated: 1/2/2014

Condition Report Icon

2012 Statewide Pavement Performance (PDF 969kb)

A report detailing the overall condition of the Washington State Routes, as categorized from Very Good to Very Poor, and based on data collected from July through October 2012. Information about general condition is provided in groups by Surface Type, Region, County and Legislative District.

Last Updated: 8/21/2013

Previous Versions: 2011 Statewide Pavement Performance (PDF 969kb)

2010 Statewide Pavement Performance Report (12/20/2011)

Highway Trends Report Icon  

State Highway Pavement Performance Trends 1984 - 2012 (PDF 293kb)

A chart detailing general condition for the last 30 years. A similar chart appears yearly in the Gray Notebook.

Last Updated: 8/21/2013

Previous Versions: State Highway Pavement Performance Trends 1983 - 2011 (PDF 293kb)

State Highway Pavement Performance Trends 1981 - 2010

WSDOT IRI Report (2013) (668 kb)

A report detailing the statewide pavement performance using International Roughness Index (IRI), using both WSDOT and FHWA categorizations.

Last Updated: 2/11/2015

Previous Versions: WSDOT IRI Report 2012 (PDF 657kb)

WSDOT IRI Report 2011 (PDF 671kb)

WSDOT IRI Report 2010

Surface Miles Icon

WSDOT Surface Type Summary (2013) (443kb)

A series of charts and tables summarizing highway miles, lane miles and annual vehicle miles traveled (AVMT) for each surface type, as based on the State Highway Log.

Last Updated: 2/9/2015

Previous Versions:  WSDOT Surface Type Summary (2012) (PDF 421kb)
WSDOT Surface Type Summary (2011) (PDF 435kb)

Lane Miles Paved Report Icon

WSDOT Preservation Miles Paved by Year (2014) (PDF 321kb)

A chart containing the lane miles paved, or projected to be paved, by project type - asphalt (ACP), chip seal (BST) and concrete (PCCP) - from 2001 through 2013.

Last Updated: 8/21/2013

Previous Versions: WSDOT Preservation Miles Paved by Year (2013 Update) (PDF 320kb)

WSDOT Preservation Miles Paved by Year - 2012 Update (PDF 334kb)

WSDOT Preservation Miles Paved by Year - 2011 Update

Pavement Life Report Icon

Average Pavement Life (2014) (PDF 485 kb)

A brief overview of average pavement life for ACP, BST and PCCP in Washington State.

Last Updated: 2/17/2015

Previous Versions: WSDOT Average Pavement Life - 2013 Update (PDF 471kb)

WSDOT Average Pavement Life - 2012 Update (PDF 501kb)
Average Pavement Life - 2011 Update