Safety Evaluation of Profiled Thermoplastic Pavement Markings

Appendix A. Additional Installation Details from Florida

This appendix presents additional details provided by FDOT regarding its installations of profiled thermoplastic pavement markings.

1. Can you provide average installation costs per line-mile and the estimated service life of the products used?

   Average cost for a 6-inch 100 mil above-surface thickness extruded with bump material could average somewhere between $3,275 to $3,900 [per] gross lane mile. Service life as required by specification is 3 years.

2. Are raised or inverted profile patterns applied?

   Raised patterns are used; inverted profile is no longer allowed by specification.

3. On which of edge lines, center lines, and lane lines are profiled thermoplastic markings applied?

   Yellow and white edge lines are specified; center line has to have a documented history of crossover accidents to be warranted.

4. Can you provide any installation guidelines for the markings (e.g., width, spacing, pavement types on which the markings are not suitable)?

   Our requirements for Specification 701 in Florida is [a] 6-inch line, audible bump is spaced at approximately [a] 30-inch spacing, [and] materials are allowed on both asphalt and concrete surfaces by Specification 701.
   
   Specification 701 is available at the following link: http://www.dot.state.fl.us/ programmanagement/Implemented/SpecBooks/January2016/Files/701-116.pdf.

5. Are there any criteria for deciding which roads receive the profiled thermoplastic markings (e.g., a certain level of AADT or critical crash rate)?

   As of January 21, 2015, policy is to use profiled thermoplastic on concrete pavements for edge lines and center lines on all rural, two-lane and multi-lane, flush shoulder, non-limited access facilities, where posted speed is 50 mi/h or greater.
   
   http://www.dot.state.fl.us/rddesign/Bulletin/RDB15-02.pdf

6. Were any other safety countermeasures installed at the treatment sites evaluated by this study in conjunction with the profiled thermoplastic markings?

   None reported.

7. Please describe any notable challenges related to the installation of the markings and how you overcame them.

   None reported.

8. Please describe any notable challenges related to the maintenance of the markings and how you overcame them.

   None reported.

9. What lessons learned or recommendations would you share with another agency interested in the widespread application of profiled thermoplastic markings?

   None reported.