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Session 60 Ulf Sandberg
Session 60 Ulf Sandberg
Session 60 Ulf Sandberg
Session 60 Ulf Sandberg
Session 60 Ulf Sandberg
Session 60 Ulf Sandberg
Session 60 Ulf Sandberg
Session 60 Ulf Sandberg
Session 60 Ulf Sandberg
Session 60 Ulf Sandberg
Session 60 Ulf Sandberg
Session 60 Ulf Sandberg
Session 60 Ulf Sandberg
Session 60 Ulf Sandberg
Session 60 Ulf Sandberg
Session 60 Ulf Sandberg
Session 60 Ulf Sandberg
Session 60 Ulf Sandberg
Session 60 Ulf Sandberg
Session 60 Ulf Sandberg
Session 60 Ulf Sandberg
Session 60 Ulf Sandberg
Session 60 Ulf Sandberg
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Session 60 Ulf Sandberg

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  1. MIRIAM Mätmetoder och vägyteegenskaper relaterade till rullmotstånd Av Ulf Sandberg Statens väg- och transportforskningsinsititut (VTI) Föredrag vid Transportforum 2011 i Linköping 13 januari 2011 Foto av Ulf Sandberg över Connecticut Ave Washington, DC
  2. MIRIAM What is MIRIAM? Project started in 2009, now with 11 partners from Europe, and 2 from USA Pooled, internal funding (so far) Aims at providing a sustainable, environmentally friendly road infrastructure ……. by reducing rolling resistance – hence lowering CO 2 emissions and increasing energy efficiency MIRIAM Models for rolling resistance In Road Infrastructure Asset Management Systems
  3. What is rolling resistance? „ Tire Technology Expo 2006” 7, 8, 9 March 2006, Stuttgart, Germany Rullmotståndskoefficient = ~ 0,5 – 1,5 %
  4. Phase 1: 2010-2011 Sub-projects 1 Measurement methods and source model(s) (Leader: VTI, Sweden) 2 Influence of pavement characteristics on energy efficiency (Leader: AIT, Austria) 3 Importance of Rolling Resistance on efficiency within an LCA framework (Leader: UC Davis, USA) 4 Constraints / Requirements to implementation in Asset Management and LCA systems (Leader: DRI, Denmark) 5 External funding and raising awareness (Leader: DRI, Denmark) MIRIAM Models for rolling resistance In Road Infrastructure Asset Management Systems
  5. SP 1 justification SP 1 will provide the data on rolling resistance (RR), as part of road surface properties in general, which forms the foundation on which MIRIAM is based If the RR data are inaccurate, insufficient or not representative, the entire project will fail It follows that the methods and equipment used to collect RR data must be relevant and correct In order not to start from scratch, SP 1 shall start by compiling present knowledge and experience (State-of-the-Art) MIRIAM Models for rolling resistance In Road Infrastructure Asset Management Systems
  6. SP 1 partners Swedish National Road and Transport Research Institute (VTI) Austrian Institute of Technology (AIT) Belgian Road Research Centre (BRRC) Danish Road Institute (DRI) Federal Highway Research Institute, Germany (BASt) Technical University of Gdansk, Poland (TUG) Institut français des sciences et technologies des transports, de l'aménagement et des réseaux (IFSTTAR) (= previously LCPC and INRETS) University of California at Davis, Pavement Research Center (UCPRC), USA (Nokian Tyres, Finland) MIRIAM Models for rolling resistance In Road Infrastructure Asset Management Systems
  7. Description of work 2010-2011 <ul><li>1 Terminology and definitions related to rolling resistance ( incl discussion about what energy losses that should be considered as part of RR ) </li></ul><ul><li>2 State-of-the-Art report: measurement of rolling resistance </li></ul><ul><li>3 Experimental work (see next page) </li></ul><ul><li>Production of a testing programme (for collection of RR data of road surfaces) </li></ul><ul><li>Using data to model the RR properties versus basic road surface characteristics (such as texture, unevenness, etc) </li></ul>But most work spent producing a project plan for an EU project MIRIAM Models for rolling resistance In Road Infrastructure Asset Management Systems
  8. Measurement methods and equipment Four main methods in our work: Rolling resistance: Measurement on drum (ISO 18164) Fuel consumption: Measurement with instrumented car Rolling resistance: Measurement with test tyre on trailer Rolling resistance: Coast-down with car or truck MIRIAM Models for rolling resistance In Road Infrastructure Asset Management Systems
  9. Measurement of rolling resistance according to ISO 18164 …. intended mainly for tyre testing Facility at the Technical University of Gdansk (TUG), Poland
  10. Drum surfaces (ISO assumes only steel or sandpaper surfaces) Chip seal (surface dressing) max 12 mm aggr Sand paper (”Safety Walk”)
  11. New RR facility recently constructed at TUG designed for truck tyres Ready for use in 2011 2.5 m
  12. Trailer constructed at TUG used for measurements at VTI in Sweden Somewhat similar but less advanced trailers exist at BRRC and BASt Technical University of Gdansk
  13. Bränsleförbrukning och utrullning
  14. Problems to be solved <ul><li>Select and define reference tyres for road surface studies </li></ul><ul><li>Consider the relevance of the existing drum surfaces and needed supplementary surface </li></ul><ul><li>Effect of drum curvature </li></ul><ul><li>Effect of temperature </li></ul><ul><li>Effect of speed </li></ul><ul><li>Effect of tyre load and tyre inflation </li></ul><ul><li>Stable calibration </li></ul><ul><li>Avoid disturbing effects of road gradient, curves and wind </li></ul>MIRIAM Models for rolling resistance In Road Infrastructure Asset Management Systems
  15. Experimental activities in 2011 <ul><li>MEASUREMENT METHODS </li></ul><ul><li>Repeatability of RR measurements on drums, and with trailers </li></ul><ul><li>Minimum test length, and min. number of runs needed for a certain accuracy </li></ul><ul><li>Speed influence on RR measurements </li></ul><ul><li>Drum curvature influence on RR measurements </li></ul><ul><li>Study regarding reference tyres that should be used for road surface RR classification </li></ul><ul><li>Study on calibration issues and effects of tyre inflation and inflation medium </li></ul>MIRIAM Models for rolling resistance In Road Infrastructure Asset Management Systems
  16. Source model development <ul><li>Model describing RR as a function of basic surface properties, such as macrotexture (MPD), megatexture, unevenness (IRI), etc. </li></ul><ul><li>Why? RR is extremely difficult to measure directly. It is better to use existing data of the road networks and calculate the RR effects </li></ul><ul><li>MPD, IRI and some other parameters are already collected by many road authorities </li></ul><ul><li>But we will also attempt to assign typical RR values for major pavement types and conditions </li></ul>MIRIAM Models for rolling resistance In Road Infrastructure Asset Management Systems
  17. www.vti.se ECRPD – Influence of IRI and MPD on RR <ul><li>Increases in car RR based on ECRPD results for the same changes in IRI and MPD as used in (Sandberg, 1997): </li></ul><ul><ul><li>at speed of 54 km/h: </li></ul></ul><ul><ul><ul><li>- IRI: increase in RR by 19 % </li></ul></ul></ul><ul><ul><ul><li>MPD: increase in RR by 46 % </li></ul></ul></ul><ul><ul><li>at speed of 90 km/h: </li></ul></ul><ul><ul><ul><li>- IRI: increase in RR by 48 % </li></ul></ul></ul><ul><ul><ul><li>- MPD: increase in RR by 72 % </li></ul></ul></ul><ul><li>The results for MPD at 90 km/h fit perfectly the trailer RR results ! </li></ul>Results of coast-down measurements on 34 test sections
  18. Specification of methods perhaps to become draft standards Rolling resistance: Measurement on drum (ISO 18164) Fuel consumption: Measurement with instrumented car Rolling resistance: Measurement with test tyre on trailer Rolling resistance: Coast-down with car or truck MIRIAM Models for rolling resistance In Road Infrastructure Asset Management Systems
  19. EU FP 7 projekt? Ansökan inlämnad Budget: 32 milj kr 4 år MIRIAM Models for rolling resistance In Road Infrastructure Asset Management Systems
  20. Examples of already collected data Results of all RR measurements in 2009 by TUG/VTI Average for 3 tyres, normalized to 80 km/h MIRIAM Models for rolling resistance In Road Infrastructure Asset Management Systems
  21. Examples of already collected data Results of RR measurements in 2010 by TUG/VTI Average for 3 tyres, and of 50 and 80 km/h (Sites RV13+E22) ABS16 ABS11 ABT11 ABT8 ABS8
  22. Examples of already collected data Results of all RR measurements in 2009 by TUG/VTI Average for 3 tyres, normalized to 80 km/h + 30 % for worst vs best roads Measurements 2010 (RV13+E22) MIRIAM Models for rolling resistance In Road Infrastructure Asset Management Systems
  23. MIRIAM THE END MIRIAM Models for rolling resistance In Road Infrastructure Asset Management Systems

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