Skip to main content

Currently Skimming:


Pages 21-38

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.


From page 21...
... 10 Chapter 3. Highway Agency Survey Results This chapter of the report presents the results of two highway agency surveys, one conducted for this project and one performed for NCHRP Synthesis 417 (30)
From page 22...
... 11 Table 3. Agency Types Represented by Survey Respondents Agency type Number (percent)
From page 23...
... 12 Table 5. 3R Policies for NHS vs.
From page 24...
... 13 Table 7. Consideration of Crash History in 3R Projects Does your agency's design process include a review of crash history for every 3R project?
From page 25...
... 14 appropriate level of geometric and safety improvement. Usually, the following accident data analyses are conducted: accident rate versus statewide average; accident analysis by type; accident analysis by location; collision diagrams.
From page 26...
... 15  We review all crash data and work with our Safety Office for design recommendations focusing on low-cost elements such as rumble strips, chevrons, widened inside shoulders, etc.  We review crash reports and consult the HSM when making decisions concerning design.
From page 27...
... 16  Up until July 2013, our agency had published 3R design criteria but only a handful of projects ever used them. We now use Safety Analyst for the analysis of crashes for resurfacing and non-resurfacing projects.
From page 28...
... 17 Table 10. Most Frequent Safety Improvements Included in 3R Projects Improvement type Number (percent)
From page 29...
... 18 Table 11. Consideration of Pedestrians and Bicyclists in 3R Projects Is consideration given to pedestrians and bicyclists in 3R projects?
From page 30...
... 19 Table 13. Formal Definitions That Distinguish Between Reconstruction and 3R Projects Does your agency have formed definitions that distinguish between reconstruction and 3R projects?
From page 31...
... 20 pavement to provide long-term service. While the work is usually confined within the existing highway corridor, some right-of-way acquisition is often required.
From page 32...
... 21  We use the word "reconditioning" to include resurfacing, rehabilitation or restoration of the pavement structure to extend the life of the roadway and effectively address critical safety and operations needs through minor improvements to the existing facility. Reconditioning projects generally utilize horizontal and vertical alignment but may entail minor widening or geometric improvement.
From page 33...
... 22  One consideration is available budget and schedule which is influenced by our legislators since they approve our transportation plan. Does not mean that a 3R project can't turn into a reconstruction or vice versa.
From page 34...
... 23 local agency that does not use the same design exception process for both reconstruction and 3R projects provided the following explanation:  Since the investment in the 3R category is less than the reconstruction investment, and we try to keep to the horizontal and vertical alignments, we have to set a somewhat different standard by nature of the situation. One other local agency commented that they do not have a formal design exception procedure.
From page 35...
... 24  We always start with the safety aspect. We reach agreement on the necessary safety outcome we seek and once the scope is established to meet the safety outcome we then move into the practical aspects of keeping as much of the infrastructure intact as possible, as long as the infrastructure can remain sound.
From page 36...
... 25  We try to keep as much of the core infrastructure as possible so we do limited drainage improvements while keeping line and grade fairly consistent with existing.  We have guidelines for bike lanes and associated city standards.
From page 37...
... 26  Our guidelines are based on TRB Special Report 214.  Not sure how our guidance compares.
From page 38...
... 27 benefits and costs of safety improvements in 3R projects. Nearly 90 percent of respondents indicated that such a tool would be helpful.

Key Terms



This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More information on Chapter Skim is available.