2005 Pavement Marking Activities and Performance

1. 2005 Pavement Marking Activities and Performance District Engineer Presentation

2. District Engineer Presentation

3. Pavement Markings Outline • Pavement Marking Tech Memo Compliance • Substantial Compliance by 2007 • Pavement Marking Performance • Retroreflective data issues – national and Mn/DOT • Central Business Activities • Material Costs increased and are predicted to increase again in 2006 (petroleum based) • Central Business still generating big savings • Wider lines • No quantitative data to show wider lines equal decreased crash rates District Engineer Presentation

4. Pavement MarkingsPolicy, Measures, Targets • Policy • Provide appropriate pavement marking on all highways 365 days a year. • Measures • Percent appropriate marking materials • Customer Satisfaction • Cost Accounting • Targets • 100 Percent appropriate materials by Dec 2007 District Engineer Presentation

5. Pavement Marking Tech Memo • Technical Memorandum 03-08-T-03 “Mn/DOT Policy for Pavement Marking Operations” • Issued May 2, 2003 for compliance by December 31, 2007 • With New Construction and Retrofit should have substantial compliance by 2007 District Engineer Presentation

6. Two Lane Two Way Non IRC Tech Memo Flow Chart IRC or Multi-Lane Divided and Undivided Life Remaining Less than 2 yrs 2 to 6 years left Life Remaining Less than 2 years Latex 2 or more yrs Epoxy Latex AADT AADT > 1500 AADT < 1500 More than 6 years left Epoxy Edge Tape Lane Line Tape Center Line Latex Epoxy District Engineer Presentation

7. Non-Compliant Roadways by centerline milesNeed 400 miles to Epoxy and 532 Miles to Tape/Epoxy8% of 11,909 miles Statewide Non-Compliant District Engineer Presentation

8. Tech Memo Retrofit Remaining Cost Estimate = 2.18 million Broken Down by District District Engineer Presentation

9. The ability of the pavement markings to reflective light back to its source. Headlights bounce off of tiny glass beads directly back to the driver instead of scattering. Wear (vehicles, weather) and Tear (snow plows) reduces Pavement Marking Retroreflectivity PavementMarking Retroreflectivity District Engineer Presentation

10. Field test of three products for wet night retroreflectivity Mobile retroreflectivity data issues undermine district confidence in the data Need an annual planned route to systematically sample the health of the Pavement Marking System 6 out of 8 Districts have Handheld Retroreflectometers District 2 upgraded to new model Preventative Maintenance Activities causing measurement and durability issues Retroreflectivity District Engineer Presentation

11. Wet Reflective Field Test TH 610 Brooklyn Park Metro District Presented at ATSSA 2006 How To Conference Presentation Posted on the Web District Engineer Presentation

12. Wet Reflective Field Test • Wet night observation • 380 WR ES three times as bright • Glomarc 90 1.5 times as bright • Pathfinder least bright but brighter than standard epoxy District Engineer Presentation

13. Retroreflective Data Plan • Greatly increase use of handheld readings on new projects and 2L2W roads • National data bias issue for mobile retro • Software algorithm flaw • Make post collection adjustments to data • Work with Pennsylvania State University • MnDOT data issues • Rebuild District confidence in data • Prove effectiveness of equipment and procedures • Created more meaningful reporting format District Engineer Presentation

14. Pavement Marking Activities • Participated in Inspector’s Workshops statewide • Field testing three Wet Reflective markings • Improved Mobile Retroreflectivity System • Retrained the data collection crew • Testing system for validity and cost effectiveness • Working with Pennsylvania State University • Repeatability testing at MnROAD • Instituting new procedures for collection and reporting • Completion of Sampling Plan • 20% complete • Completion of 2006 Specifications • 20% complete District Engineer Presentation

15. 2005 costs rose 7% due to increased material costs Labor costs stayed about the same in 2005 Central Striping BusinessLine Maintenance District Engineer Presentation

16. Central Striping Business Line Maintenance • Material cost reduction • started in 2003 • Reduced line thickness for liquid markings from 15 to 12 mils • Reduced glass beads in epoxy from 30 lbs/gal to 15 lbs/gal • Latex is performing the same • Epoxy (need long term data) • Possible durability issue District Engineer Presentation

17. Central Striping BusinessLine Maintenance Volume (Miles) District Engineer Presentation

18. Central Striping Business Line Maintenance Expenditures Labor and Equipment Materials District Engineer Presentation

19. Central Striping BusinessLine Maintenance Unit Cost District Engineer Presentation

20. Wider Lines • Six inch wide lines • Literature review: no scientific evidence to support increase safety with increase width of lines • Many states have adopted wider lines for safety because of positive customer response • Wider lines are intuitively easier to see District Engineer Presentation

21. Summary • 92% Compliance for Appropriate Marking Materials, predicted 100% compliance by 2007 • Creating better performance evaluation of marking materials • Central Business efficiency has reduced costs; rising petroleum prices have increased material costs • Survey results: customers are positive but not completely satisfied District Engineer Presentation