SDDOT / Project Development / Planning / Needs Book

Needs Book Coordinator: Larry Dean
Phone: (605) 773-2586

Needs Book 2009 - Online

The 2009 edition of the Highway Needs and Project Analysis Report reflects our thirteenth year using the enhanced pavement management system and the use of automated mapping to produce this report. This is the sixth edition to utilize the ESRI’s geographical information systems (GIS) software. The ESRI software allows for more detailed maps to help identify segment locations.

The enhanced pavement management system operates under a system based on the optimization principle. Simply put, the system selects improvement projects that provide the maximum benefit to cost ratio until available funds are expended. Therefore, highway improvements could take place any time it is most cost effective, even though the pavement may not be in the worst condition. A minor improvement could significantly increase the life expectancy of a pavement.

The enhanced pavement management system provides greater accuracy in predicting life cycles. The system has life cycles based on specific pavement types and applied treatments. The system allows these life cycles to be refined based on past performance. As a result, greater accuracy is achieved in predicting pavement performance and needs.

A majority of the distress data for this system is collected through a yearly visual pavement surface survey. Visual distresses surveyed include: transverse cracking, fatigue cracking, patching/patch deterioration, block cracking, D-cracking/ASR, joint spalling, corner cracking, joint seal damage, and punchouts. The “Surface Condition Index” is then calculated using these indices combined with faulting and roughness data for concrete surfaces or rutting and roughness data for asphalt surfaces. The surface condition index provides an indication of the overall health of the pavement.

Segment analysis lengths are determined by many factors. The following factors will cause a pavement analysis segment to be created:

Highway terminal breaks (primarily highway offsets);
Changes in pavement type (excludes AC type changes less than 1/2 mile.);
STIP project limits (programmed projects);
Changes in Funding Category;
Changes in SDDOT Region designation;
Change in State Significance designation;
Change in Improvement type (reconstruction vs. resurfacing);
Change in Roadway Width greater than 10 feet;
Change in Year Graded. (Year Resurfaced)

Distress data is gathered by pavement management personnel, maintenance costs are extracted from maintenance cost file, and bridge data is extracted from the bridge management system. The remaining data is collected by Transportation Inventory Management and loaded into the pavement management system via the Roadway Environment System (RES). The pavement condition data shown in this report reflects the condition of the pavement at the time of rating. Structural data represent the predominate values for that segment.

As a result, the data may not always reflect the actual field conditions at a given location. Please refer to the "State Highway Log" for point specific geometric data.

This report will only include major mainline improvements. Minor improvement types (such as fence repair, roadway lighting, signing, etc.) will not be included in this report. Data represents budget estimates and STIP projects as of March 31, 2009. Please refer to the current Statewide Transportation Improvement Program (STIP) for a detailed listing of programmed highway projects.

For easy report reference, the routes are assembled in numerical order by highway number and MRM’s. Shown along the upper edge of each sheet is the highway number and the MRM's for segments listed on the page.

A condensed set of “Definitions” for the report is on the following pages. A number of maps illustrating highway data have been added to the rear of the report. These provide quick reference to numerous pavement-related topics. Appendix A follows the maps and provides comprehensive definitions of the data fields.

Note: The faulting data was collected in 2007 (07) not in 2008 (08) as indicated in this manual.

We encourage constructive comments and criticisms. Notification of incorrect data should be reported to:

Larry Dean
S.D. Department of Transportation
Division of Planning/Engineering
700 Broadway Avenue East
Pierre, S.D. 57501-2586
Telephone (605) 773-3268