U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
This section discusses how to estimate HFST implementation costs and potential means of funding the safety improvement.
Costs will fluctuate based on choice of aggregate, binder, and application method. Many agencies can find the lowest unit cost when they are able to get two or more contractors to compete for the project.
On average, the cost breakdown for HFST installation is approximately comprised of 50 percent for labor and application and 50 percent for materials (i.e., aggregate and binder). Of the materials cost, roughly two-thirds of that cost can be attributed to the binder, as approximated in Figure 10.35 Most of the aggregates used for HFST generally range from $350 to $500 per ton.
States' HFST unit costs range from $22 to $35 per sq. yd. Typically, unit costs are lower when:
Overall, HFST's benefit-cost ratio is high since the crash reductions are typically drastic and continue for many years indicating a positive return on investment for each dollar spent on the treatment. SCDOT found a benefit-cost ratio of about 24 to 1 during a before and after study for a series of HFST curve installations.38
A report commissioned by Transit New Zealand showed a benefit-cost ratio of 40, whereas Virginia Tech Transportation Institute (VTTI) found that HFSTs produce benefit-cost ratios ranging between 2.23 and 8.45.39, 40 TTI estimates HFST return on investment to be approximately five-fold if an initial application prevents one fatal or injury crash (valued at over $158,000). If a fatality is averted, the return is over 100 times the amount invested.41
The exact nature of each particular installation and the problem it addresses will have a direct bearing on the exact benefit-cost ratio that can be achieved, but in general, HFSTs have shown to produce a significant return on investment in a short period of time.
HFST qualifies for Federal funding under the Highway Safety Improvement Program (HSIP), which is geared toward reducing crashes, fatalities, and injuries on all public roads. While each State's process varies, local agencies can apply to receive funding for HFST projects within their jurisdiction.
In the past, the Federal Highway Administration (FHWA) has matched HFST project costs through a 90/10 split utilizing funds in the HSIP program. In the future, the Federal government may cover the entire cost.42
PennDOT's HFST projects have been entirely funded through the HSIP program, which allocated $8 million to be spent over two years using the treatment. TDOT primarily utilizes HSIP funds for HFST projects, and supplements with 23 U.S.C. 154 Open Container funds, to cover 100 percent of project costs. Caltrans has completed and/or planned approximately 139 HFST projects on their State highway system using HSIP funding, with an additional 30 to 40 completed and/or planned on the local system.
35 FHWA's High Friction Surface Treatments Frequently Asked Questions. Publication No. FHWA-CAI-14-019. [ Return to note 35. ]
36 Ibid. [ Return to note 36. ]
37 Interview with Joey Riddle and Brett Harrelson, South Carolina Department of Transportation, conducted on November 12, 2014. Interview with Gary Modi, Pennsylvania Department of Transportation, conducted on January 20, 2015. [ Return to note 37. ]
38 FHWA's High Friction Surface Treatments Frequently Asked Questions. Publication No. FHWA-CAI-14-019. [ Return to note 38. ]
40 Izeppi, Edgar, Gerardo Flintsch and Kevin McGee. Field Performance of High Friction Surfaces. Virginia Transportation Research Council, Richmond, June 2010. [ Return to note 40. ]
41 B. Brimley and P. Carlson, Using High Friction Surface Treatments to Improve Safety at Horizontal Curves. July 2012. Available at: http://d2dtl5nnlpfr0r.cloudfront.net/tti.tamu.edu/documents/TTI-2012-8.pdf. [ Return to note 41. ]
42 Interview with Darrell Chambers and Robert Peterson, California Department of Transportation, conducted on November 25, 2014. [ Return to note 42. ]
|< Previous||Table of Contents||Next >|