Topics. Test Objective. Participating Manufacturers 2/23/2010. ITE/IMSA Joint Conference SeaTac Doubletree Hotel February 22, 2010.

Transcription

1 ITE/IMSA Joint Conference SeaTac Doubletree Hotel February 22, 2010 Technical Session 2 Durable Lane Marking Evaluation and 2009 MUTCD Reflectivity Requirements Topics Waterborne Paints I 90 Pavement Marking Materials Test US 2 Safety Corridor MMA and Profiled MMA RPM Application Waterborne Paints WSDOT State Contract Paints & Experience 1. Standard 15 mil S W TL $6.209/gal 2. Cold Temperature 15 mil CW W TL $7.29/gal 3. Highbuild mil HB W TL $9.197/gal WSDOT Standard Specifications, 8.22 & 9.34 Amendments for new waterborne paints 1. Standard 10 mil and 15 mil 2. Cold Temperature 10 mil and 15 mil 3. Highbuild 10 mil and 25 mil September 2004 to 2008 with Supplement 2009 Problematic area for pavement markings Reasons: Weather Traffic Snow removal operations 4 Test Objective Find a pavement marking system that will provide year round delineation Information will be used on other mountain passes and highways in Washington State. Participating Manufacturers 1. Advance Traffic Markings (ATM) two tapes 2. Ennis Paint one MMA, one thermoplastic 3. EpoPLEX Polyurea 4. Innovative Performance Systems (IPS) Polyurea and Modified Urethane 5. Rainline thermoplastic 6. TMT Pathway four MMA, one thermoplastic 7. 3M three tapes 5 6 1

2 Vicinity Map Installation Pictures 7 8 Snow Removal Policy Snow Removal Policy was changed in 2004/05 to use deicers and anti icers. Use of sand is only in unusual situations. Winter ,000 CY Winter CY Winter CY Winter CY Winter ,250 CY Winter ,300 CY 9 10 Slide Legend LL Lane line EL Edge line R 30 meter Retroreflectivity D Durability section average April 20, 2005 S1 Section 1 M4 H Structured Surface MMA EL R 309 D 10 Section 1 Ennis Pathfinder MMA LL R 151 D 7 EL R 00 D 0 11 May 6,

3 April 20, 2005 S2 M1 G Profiled surface MMA LL R 195 D 10 TMT Streamline MMA LL R 100 D May 6, 2008 April 20, 2005 S2 M6 K Profiled surface tape LL R 874 D 10 3M 380I ES LL R 109 D May 6, 2008 April 20, 2005 S4 IPS HPS 4 Modified Urethane (hybrid epoxy) LL R 61 D 7 M2 C Polyurea DD EL R 268 D 10 EpoPLEX LS 90 PU EL R 57 D 1 Double drop beads 17 May 6,

4 250 April 20, 2005 S4 M4 H Structured surface MMA LL R 276 D 10 Ennis Pathfinder MMA LL R 168 D 9 19 May 6, April 20, 2005 S4 M7 P Inverted profile Thermoplastic LL R 163 D 10 Rainline LL R 168 D 7 21 May 6, I 90 Pavement Marking Materials Test Broken Lane Lines Retroreflectivity (millicandelas/meter²/lux) I 90 Pavement Marking Materials Test Broken Lane Lines Retroreflectivity (millicandelas/meter²/lux) I-90 Pavment Marking Materials Test - Skip Lines Retroreflectiv vity LS-90 Polyurea w/ dd bds TMT Streamline MMA 3M 380I-ES TMT Thermoplastic 3M 750WR ATM 300 Ennis Thermoplastic ATM 400 Ennis Pathfinder MMA LS-90 Polyurea w/clstrs & bds HPS-5 Polyurea TMT Thin spray MMA 40 TMT Thin spray MMA 60 State waterborne paint 23 4

5 Retroreflectivity Results Table 1. Test Pavement Marking Material Retroreflectivity Number of Markings with Retroreflectivity Rating 4/20/05 >100 >125 >250 Total Section Section Section Total Summary Durable materials, with protection where needed, make it possible to maintain a yearround retroreflective pavement marking on I 90 Snoqualmie Pass US 2 Safety Corridor Monroe to Skykomish EpoPLEX LS 90 PU LL R 93 D 9 EL R 77 D 8 Photo taken May 5, 2008 Pavement Markings 2008 Contract 2009 Contract May 6,

6 Site Characteristics 45 miles following Skykomish River 2 lane highway Flat grades Rain Snow Steel snowplow zone Traffic Characteristics ADT 20,000 west end and ADT 5,000 east end Safety Corridor 2008 Project Lower portion Centerline rumble strips with RRPMs Centerline stripe, 90 mil MMA outside rumble strip Grooved Edge lines, 100 mil grind with 60 mil MMA 2008 Centerline and edge line Lower portion Upper portion Centerline rumble stripes, 90 mil MMA with RRPMs Grooved Edge lines, 100 mil grind with 60 mil MMA 2008 Centerline Rumble Stripe Upper portion Grooved Edge Line 6

7 2008 Lessons Learned Grooved edge line too deep fills with water Centerline RRPMs too deep fill with water Surface applied MMA Centerline stripe had low retroreflectivity i Rumble stripe centerline when a single broken 4 inch wide line (passing allowed both directions) not enough target value 2009 Project All in Lower portion, Monroe to Sultan Centerline rumble strips with RRPMs Centerline stripe and no pass stripes, 90 mil MMA in rumble strip (rumble stripe) Broken centerline 8 inches wide Grooved Edge lines, Groove 5 inch wide X 40 mil deep 4 inch wide X 120 mil thick structured surface MMA. Striping 8 Wide dual pass stripe in center of rumblestrip Wider Line provides more surface area for reflectivity compared to 4 stripe Has less chance of wearing off from plows during snow storm Michigan After one winter comparison of rumble stripe to surface stripe. Dry night. Michigan After one winter comparison of rumble stripe to surface stripe. Wet night. Surface stripe is still visible on a dry night. The surface stripe disappears on a wet night. 7

8 Structured MMA Striping Application Applying Pavement Marking Correctly High retro-reflectivity plays an essential part in improving safety along US 2 If applied correctly, striping will last. Picture as of February 3, Lessons Learned Inspectors were given retroreflectometer and templates to inspect markings. Retroreflectivity good. Milderwinter with no snow plowing (sofar) Some rain No complaints Pavement Marking System is performing as intended. MMA and Profiled MMA Began using profiled MMA in late 1980 s primarily as a safety measure to get the button crew off the highway. Standard Plan M I assume that we began using flat MMA about this time MMA Performance Very durable WSDOT has profiled MMA on I 5 that is over 10 years old. Provides audible noise (can be too loud) Initial retroreflectivity can be low for extruded MMA. Retroreflectivity decreases to R L +/ and remains at this level. Supplemented with RPMs for wet night retroreflectivity 8

9 Snow plow damage WSDOT Striping Future Goal Provide an appropriate pavement marking on all highways, 365 days per year. Pavement Marking Management More durable products to provide striping i goal Marking protection where needed The Button Machine We have fire, the wheel, boats, trains, automobiles, airplanes, spacetravel, the internet and now: Georgia DOT and Georgia Tech have a working prototype of a Button Machine that applies buttons at 5 mph Video and questions Thank you. 9