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Main activities in NORTRIP 2010/11 ( until next meeting). Focus on the processes that affect road dust generation and emission Identify the most critical processes that affect road dust emissions

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main activities in nortrip 2010 11 until next meeting
Main activities in NORTRIP 2010/11 (untilnext meeting)
  • Focus on the processesthataffect road dust generation and emission
  • Identify the mostcriticalprocessesthataffect road dust emissions
  • Gather all relevant (existing) datasetsthatmay be usedtounderstand generation and emissions duetotheseprocesses
  • Make sensitivity tests with new or existingparameterisationsusing the data sets
agenda
Agenda
  • 9 – 10 Coffee buffé is served
  • 10 – 12 NILU and SMHI road dust emission models (Bruce and Gunnar)
    • Current parameterizations of important processes
    • Urgently needed improvements of existing parameterizations
    • Urgently needed new parameterizations
  • 12 – 13 Lunch
  • 13 – 15 Experimental data and proposed parameterizations for PM10 emissions due to influence of:
    • Pavement and tire type (VTI)
    • Sand/salt (FMI)
    • Road wetness (SLB)
    • Wind and traffic induced suspension (DMU)
    • Vehicle speed (SLB/ITM)
    • Studded tyre share (SLB/ITM)
    • Any other process (all)
  • 16 – 17 Conclusions, how to proceed with model testing and validation
  • 14.30 – 16 Coffee buffé is served
vti road test facility
VTI road test facility

Several test roads

Different pavements

Different tyres

Gustafsson et al.

speed emission measurement using emma
SpeedEmission measurementusing EMMA

Mixed rural roads

Both suspension and direct emission

reduced speed on rv4 oslo nilu
Reduced speed on RV4Oslo (NILU)
  • In 2005, relative to 2004:
    • Traffic volume on Rv4 was reduced by 3%
    • 10% less studded tyres
    • Measured speed was reduced by 12 km/h

Foto: Aftenposten, Tor Richardsen

reduced speed on rv4 oslo nilu1
Reduced speed on RV4Oslo (NILU)
  • Changed concentration on RV4 compared to other station without reduced speed limit:
    • PM10: - 36 %
    • PM10, max hour: - 30 %
    • PM10, max daily: - 20 %
    • PM coarse fraction: - 39 %(Road dust)
speed dependent pm10 emission factor multiple linear regression of road side data
Speed dependent PM10 emission factormultiplelinear regression of road side data

mgPM10/vkm per 10 km/h

Road tunnel

Motor-

way

Motorways

Johansson et al., 2010

impact on pm10 of speed reductions
Impact on PM10of speed reductions

Johansson et al., 2010

tyre type vti road test facility
Tyre typeVTI road test facility

Studded winter tyres

30 km/h

50 km/h

70 km/h

Non-studded Nordic winter tyres

Summer tyres

Gustafsson et al.

studded tyres s dra l nken road tunnel
Studded tyresSödra länken road tunnel
  • Measurementsof PM10/Noxratio => emission factor =f(studded tyre share)
ban on studded tyres reduced amount of traffic hornsgatan
Ban on studded tyres reducedamountoftraffic Hornsgatan

Christmas Holiday

Summer Holiday

  • Trafikenminskade med 25 % jan – apr 2010
reduced studded tyre share due to ban
Reducedstudded tyre sharedueto ban

Förbud från 1 jan 2010

Förbud

  • ~40 % avfordonen hade dubbatpåHornsgatan
  • ~50-55 % påandra gator och 65 % påinfarterna
studded tyre influence on emissions in street canyons
Studded tyre influence on emissions in streetcanyons
  • ~40% lägreemissioner under Jan-Mar
  • ~15-20 % lägreemissioner under helaåret

Samband mellan PM10 halter och dubbandel:

Veckomedelvärden av PM10 halterna som funktion av dubbandelen Okt –Dec 2003

studded tyre fees in norway
Studded tyre fees in Norway
  • Study from 2001 shows that:10 % reduction (absolute) studded tyres 1 µg PM10/m3 reductionwinter season mean value
  • Impact on emission factor?
2009 10 sn rik vinter f rre verskridande

Rullande veckomedelvärden ug/m3

2009/10Snörik vinter => färre överskridande

2007

2009

2008

2010

Antal dygn >50 ug/m3

2008

2009

2007

2010

betongbel ggning emissionsm tning
BetongbeläggningEmissionsmätning

Betong ger 25% - 30% lägre emission

med dubbdäck

Johansson et al, 2009

bullerd mpande bel ggning emissionsm tning
Bullerdämpande beläggningEmissionsmätning

Bullerdämp.

Referens

Mängden suspenderbart material vägytorna

viktigare än beläggningsegenskaperna

Johansson, 2010