MnDOT Road Research Update Maureen Jensen Benjamin Worel TRB January 17, 2013

 TERRA  MnROAD  International Pavement Engineering Meeting at TRB  International Exchanges

 TERRA formed in 2004  Helped develop Phase-II  Government, industry and academia members  MnROAD Benefits ◦ Attracts key public, industry, academic partners contributions ◦ Participation in future initiatives- better results, implementation

 Research and Implementation ◦ Roundabouts, Concrete Overlays, Porous Asphalt,  Engagement ◦ Funded $653,000 projects, Tomas Wiennerholt MN Visit  Communication and Outreach ◦ 220 People TERRA Research Conference – St Paul ◦ TERRA Innovation Series – Houghton ◦ Webinars  Fact Sheets

 History ◦ Phase I ( ) ◦ Phase II (2007-present) ◦ Phase III (~2016)  Ongoing Monitoring ◦ Performance Data ◦ Sensors ◦ Database / Data Release 2.0  Completing Phase-II Research Studies  2012/2013 Construction  2016 Effort

 6” HMA over 33” Class-4 (1993) ◦ Severe transverse & Longitudinal wheel path  (2006) Right lane:1½ inch mill & fill PG Goal Find a better “cheap fix” for worn out pavements

◦ 3 Layer System  tack coat / scratch coat / final surface ◦ Type II Granite ◦ 6% Kraton polymer modified asphalt  instead of 3% post added latex ◦ PG Base asphalt  instead of typical PG (initially tried at MnROAD in 2006)

 Before Micro ◦ Right lane 126 in/mi ◦ Left lane 190 in/mi  After Micro ◦ Right lane 95 in/mi ◦ Left lane 96 in/mi  3 months ◦ Right lane 100 in/mi (21% improvement) ◦ Left lane 99 in/mi (48% improvement)

 Beginning to Plan for 2016  Working with Research Partners & Customers  MnDOT  LRRB  TERRA  FHWA  Continue to Develop Partnerships ◦ Interested in your input

 Ground Penetrating Radar  FHWA – Tom Yu  Norway – Anne Lalague  MnDOT – Shongtao Dai  LTA – Experiences and Implementation  Swedish mining road test sections  International Design Comparison  Swedish Road Maintenance Performance Standard and the Web-PMS tool

 Tomas Wiennerholt (3 week visit – Nov 2012)  Ben Worel (3 week visit – June 2013) ◦ BCRRA Conference  International Flexible Design Comparison ◦ Norway – Sweden – Denmark Visits  MnROAD Research and Operations  Low Temperature Cracking investigation  Warrantees, FWD quality control, stabilization, WIM, HVS  Pervious Pavements, Traffic Speed Deflectometer, climate change