5/12/2006 District Engineer Presentation Pavement Marking Activities and Performance

5/12/2006 District Engineer Presentation2

5/12/2006 District Engineer Presentation3 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

5/12/2006 District Engineer Presentation4 Pavement Markings Policy, 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

5/12/2006 District Engineer Presentation5 Pavement Marking Tech Memo Technical Memorandum 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

5/12/2006 District Engineer Presentation6 Two Lane Two Way Non IRC IRC or Multi-Lane Divided and Undivided Life Remaining Latex Epoxy Less than 2 yrs 2 or more yrs Latex AADT < 1500 AADT > 1500 Latex Less than 2 years Epoxy 2 to 6 years left More than 6 years left Epoxy Edge Tape Lane Line Tape Center Line Life Remaining AADT Tech Memo Flow Chart

5/12/2006 District Engineer Presentation7 Non-Compliant Roadways by centerline miles Need 400 miles to Epoxy and 532 Miles to Tape/Epoxy 8% of 11,909 miles Statewide Non-Compliant

5/12/2006 District Engineer Presentation8 Tech Memo Retrofit Remaining Cost Estimate = 2.18 million Broken Down by District

5/12/2006 District Engineer Presentation9 Pavement Marking Retroreflectivity 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

5/12/2006 District Engineer Presentation10 Retroreflectivity 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

5/12/2006 District Engineer Presentation11 Wet Reflective Field Test TH 610 Brooklyn Park Metro District Presented at ATSSA 2006 How To Conference Presentation Posted on the Web

5/12/2006 District Engineer Presentation12 Wet night observation –380 WR ES three times as bright –Glomarc times as bright –Pathfinder least bright but brighter than standard epoxy Wet Reflective Field Test

5/12/2006 District Engineer Presentation13 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

5/12/2006 District Engineer Presentation14 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

5/12/2006 District Engineer Presentation15 Central Striping Business Line Maintenance 2005 costs rose 7% due to increased material costs Labor costs stayed about the same in 2005

5/12/2006 District Engineer Presentation16 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

5/12/2006 District Engineer Presentation17 Central Striping Business Line Maintenance Volume (Miles)

5/12/2006 District Engineer Presentation18 Central Striping Business Line Maintenance Expenditures Labor and Equipment Materials

5/12/2006 District Engineer Presentation19 Central Striping Business Line Maintenance Unit Cost

5/12/2006 District Engineer Presentation20 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

5/12/2006 District Engineer Presentation21 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