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Federal Department of the Environment, Transport, Energy and Communications DETEC

Swiss Federal Office for the EnvironmentNoise Abatement Division

Low-noise pavementsfor urban areas

50th GRB session Sept. 1.-3. 2009 - Geneva

Gregor SchguaninSwiss Federal Office for the EnvironmentNoise abatement divisionCH - 3003 Berne

E-Mail: [email protected]

Hubert

Text Box

Informal Document No. GRB-50-13 (50th GRB, 1-3 September 2009 agenda item 9)

223.9.2009 50th GRB session | Low-noise pavements for urban areasG. Schguanin, FOEN, Noise Abatement Division

Noise nuisance in Switzerland

Noise is one of the major environmental problems (economically & health)1.3 Mio. persons > IGW in total1.2 Mio. persons > IGW road traffic (16% of population)

=> 85% in urban areas

Motivation


Noise improvement measuresNoise barriesSound proof windowsNoise reducing pavementsOther measures (vred, traffic management, …)

?

Feasibility ?Appearance ?Acceptance ?

Measures

Standard measurein urban areas


The challenge1.2 Mio. Pers. > IGW costs of improvement : 1.33 Mia. * External costs: 1.16 Bio. p.a.

Traffic noise impact (2009)Costs in CHF* estimated remaining projects


Szenario Reduktion 3 dBAGebäude >IGWThe aim: 50 % reduction

0.6 Mio. Pers. > IGWcosts of improvement: 0.67 Mia.*External costs: 0.58 Bio. p.a.

Costs in CHF* estimated remaining projects


Szenario Reduktion 3 dBAGebäude >IGW

The way to go: - 3 dBA through low-noise technology


Remaining tasks for GRB…

…quieter vehicles…quieter tyres

=> by establishing effective regulations!

Polluter pays-principle ??


-6.0

-5.0

-4.0

-3.0

-2.0

-1.0

0.0

1.0

2.0

3.0

4.0

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24Belag

Abw

eich

ung

vom

Mod

ell S

TL-8

6+ [d

BA

]

45-60 km/h

< 45 km/h

1 SPA6 6 SMA8 11 TA16 16 TA10 21 OB 6/11

2 SPA8 7 Monok. 6 12 SMA10 17 OB 22 MR8

3 SPA11 8 AB11 13 SMA6 18 AB16 23 Beton

4 MR6 9 AB10 14 HMT16 19 MR11 24 Pflaster

5 SMA11 10 GA 15 OB 3/6 20 OB6/10

5-6 dBA

+3 dBA

-5 dBA

Spread of acoustic pavement qualityurban

Pavement ratings

Dev

iatio

n fro

m m

odel

Pavement

Concrete

Cobbles


Long-term behaviour of an urban low-noise pavement

• Initial noisereduction> 3dBA

• Acoustic lifetimeof -1 dBAover > 12 years

Goals:Definition of long-term low-noise pavements

Range for long-term low-noise pavements

Dev

iatio

n fr

om m

odel

STL

86+

[dB

A]

Age of pavement

Research goals


Nanosoft test-track in Geneva

• NANOSOFT by COLAS is hot asphalt concrete for application in thin or very thin wearing courses designed to provide a sharp reduction of vehicle noise.

• The trials in place show spectacular results: - 9 dB(A), i.e., noise power is divided by 8.

• Nanosoft noise reduction performance is long-lasting thanks to a convoluted network of micro air voids that reduce clogging. Its mechanical performance levels are equivalent to those of an asphalt concrete in the same category (> to be verified !)

• Nanosoft’s special grading curve provides excellent skid-resistance, thus improving safety for neighboring residents and users.

• NANOSOFT, with a 0/4 mm grading curve, includes a high proportion of small aggregates bound together by Colflex elastomer modified bitumen binder.

• Noise absorption is optimal in thicknesses ranging from 25 and 40 mm.

• It offers excellent rut resistance, even in thin courses.

• NANOSOFT is designed for the construction and renovation of all types of roadways, regardless of traffic levels. It is particularly well suited for city streets and urban freeways.

• It is visually-appealing and provides surface drainability that helps reduce tire water spray in rainy weather.

Nanosoft


CPX-Results

-10

-8

-6

-4

-2

0

2

4

0 100 200 300 400 500

Distanz [m]

Abw

. STL

86+

[dB

A]

CPXcars, 50 km/hCPXtrucks, 50 km/h

Teststrecke

Test track Nanosoft 4 Plan-les-Ouates, driving lane south

Ø PW: -9.1 dBØ LKW: -7.0 dB

Δ = 11 dB

Nanosoft


65

70

75

80

85

90

95

315

400

500

630

800

1000

1250

1600

2000

2500

3150

4000

5000

Frequenz (Terzbänder) [Hz]

Lf [d

BA

]

B elag vo r/ nach Test st recke, C PX carsB elag vo r/ nach Test st recke, C PX t rucksN anosof t 4 , C PX carsN anosof t 4 , C PX t rucks

Δ = 15 dBfor dominant frequencies

CPX-Frequency-AnalysisNanosoft


Further aspectsCompliance with standardsContracts specifications & guaranteesStatic behaviourGripSafetyDrainage capacityAbrasivityMax. lifecycleMin. costsMin. maintenanceMaintenance during winter periodRepairabilityRecycling aspects…

… and noise reducing

=> Success through cooperation !

Outlook


The next steps….> broad practical application

> applied research

> improved long-term behaviour

Thank you for your attention!

Do not defrost. Remove fish fingers from packaging and fry on all sides for 5-7 minutes.


Links

• Swiss noise abatement ordinance:http://www.bafu.admin.ch/laerm/01148/index.html?lang=en

• FOEN website BAFU – Noise Abatement Division:http://www.bafu.admin.ch/laerm/index.html?lang=en

• Road Noise guidelines (D/F) Pavement acoustics > Annex 1http://www.bafu.admin.ch/laerm/01148/03448/index.html?lang=de

• Swiss research project‚ low-noise urban pavements:Final report 2007 (D/F):http://www.bafu.admin.ch/publikationen/publikation/00702/index.html?lang=de

Final report 2007 - condensed version (D/F/E):http://www.bafu.admin.ch/publikationen/publikation/00704/index.html?lang=en

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