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Ögren, Mikael
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Publications (10 of 42) Show all publications
Wei, W., Botteldooren, D., Renterghem, T. V., Hornikx, M. C., Forssén, J., Salomons, E. M. & Ögren, M. (2015). Erratum: Urban background noise mapping: The general model (Acta Acustica united with Acustica (2014) 100 (1098-1111) DOI:10.3813/AAA.918789). Acta Acoustica united with Acustica, 101(1)
Open this publication in new window or tab >>Erratum: Urban background noise mapping: The general model (Acta Acustica united with Acustica (2014) 100 (1098-1111) DOI:10.3813/AAA.918789)
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2015 (English)In: Acta Acoustica united with Acustica, ISSN 1610-1928, E-ISSN 1861-9959, Vol. 101, no 1Article in journal (Refereed) Published
Keywords
Noise, Dwelling, Noise level, Mathematical model, Prediction, Surface, Reflection
National Category
Fluid Mechanics and Acoustics
Research subject
10 Road: Transport, society, policy and planning, 15 Road: Environment
Identifiers
urn:nbn:se:vti:diva-9304 (URN)10.3813/AAA.918818 (DOI)000348020800021 ()2-s2.0-84919754467 (Scopus ID)
Available from: 2016-05-25 Created: 2016-03-02 Last updated: 2017-11-30Bibliographically approved
Andersson, H., Swärdh, J.-E. & Ögren, M. (2015). Traffic noise effects of property prices: hedonic estimates based on multiple noise indicators. Stockholm: Centre for Transport Studies
Open this publication in new window or tab >>Traffic noise effects of property prices: hedonic estimates based on multiple noise indicators
2015 (English)Report (Other academic)
Abstract [en]

Valuation of traffic noise abatement based on hedonic pricing models of the property market has traditionally measured the noise as the equivalent, or another average, level. What is not captured in such a noise indicator is the maximum noise level of a vehicle passage. In this study, we incorporate the maximum noise level in the hedonic model letting the property price depend on both the equivalent noise level and the maximum noise level. Hedonic models for both rail and road noise are estimated. Data consists of characteristics of sold properties, property-specific noise calculation, and geographical variables.

We use the hedonic approach to estimate the marginal willingness to pay (WTP) for maximum noise abatement where we model the effect as the maximum noise level subtracted with the equivalent noise level. Furthermore, we control for the equivalent noise level in the estimations. The estimated results show that including the maximum noise level in the model has influence on the property prices, but only for rail and not for road. This means that for road we cannot reject the hypothesis that WTP for noise abatement is based on the equivalent noise level only. For rail, on the other hand, we estimate the marginal WTP for the maximum noise level and it turns out to be substantial. Also, the marginal WTP for the equivalent noise levels seems to be unaffected by the inclusion of the maximum noise level in the model. More research of this novel topic is requested though.

Place, publisher, year, edition, pages
Stockholm: Centre for Transport Studies, 2015. p. 28
Series
CTS Working Paper ; 2015:11
Keywords
Noise annoyance, Noise level, Value analysis, Willingness to pay, Rail traffic, Road traffic
National Category
Economics
Research subject
00 Road: General works, surveys, comprehensive works, 02 Road: Economics; J00 Railway: General works, surveys, comprehensive works, J13 Railway: Economics
Identifiers
urn:nbn:se:vti:diva-7952 (URN)
Available from: 2015-08-21 Created: 2015-08-21 Last updated: 2016-08-22Bibliographically approved
Forssén, J., Hornikx, M., Botteldooren, D., Wei, W., Van Renterghem, T. & Ögren, M. (2014). A model of sound scattering by atmospheric turbulence for use in noise mapping calculations. Acta Acoustica united with Acustica, 100(5), 810-815
Open this publication in new window or tab >>A model of sound scattering by atmospheric turbulence for use in noise mapping calculations
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2014 (English)In: Acta Acoustica united with Acustica, ISSN 1610-1928, E-ISSN 1861-9959, Vol. 100, no 5, p. 810-815Article in journal (Refereed) Published
Abstract [en]

Sound scattering due to atmospheric turbulence limits the noise reduction in shielded areas. An engineering model is presented, aimed to predict the scattered level for general noise mapping purposes including sound propagation between urban canyons. Energy based single scattering for homogeneous and isotropic turbulence following the Kolmogorov model is assumed as a starting point and a saturation based on the von Kármán model is used as a first-order multiple scattering approximation. For a single shielding obstacle the scattering model is used to calculate a large dataset as function of the effective height of the shielding obstacle and its distances to source and receiver. A parameterisation of the dataset is used when calculating the influence of single or double canyons, including standardised air attenuation rates as well as façade absorption and Fresnel weighting of the multiple façade reflections. Assuming a single point source, an aver aging over three receiver positions and that each ground reflection causes energy doubling, the final engineering model is formulated as a scattered level for a shielding building without canyon plus a correction term for the effect of a single or a double canyon, assuming a flat rooftop of the shielding building. Input parameters are, in addition to geometry and sound frequency, the strengths of velocity and temperature turbulence.

Place, publisher, year, edition, pages
S. Hirzel Verlag, 2014
Keywords
Noise, Distribution (gen), Atmosphere, Decrease, Calculation
National Category
Fluid Mechanics and Acoustics
Research subject
SAB, Ucc Physics
Identifiers
urn:nbn:se:vti:diva-9381 (URN)10.3813/AAA.918760 (DOI)000340346700003 ()2-s2.0-84907060527 (Scopus ID)
Available from: 2016-03-16 Created: 2016-03-02 Last updated: 2017-11-30Bibliographically approved
Wei, W., Botteldooren, D., Renterghem, T. V., Hornikx, M. C., Forssén, J., Salomons, E. M. & Ögren, M. (2014). Urban background noise mapping: The general model. Acta Acoustica united with Acustica, 100(6), 1098-1111
Open this publication in new window or tab >>Urban background noise mapping: The general model
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2014 (English)In: Acta Acoustica united with Acustica, ISSN 1610-1928, E-ISSN 1861-9959, Vol. 100, no 6, p. 1098-1111Article in journal (Refereed) Published
Abstract [en]

Surveys show that inhabitants of dwellings exposed to high noise levels benefit from having access to a quiet side. However, current practice in noise prediction often underestimates the noise levels at a shielded façade. Multiple reflections between façades in street canyons and inner yards are commonly neglected and façades are approximated as perfectly flat surfaces yielding only specular reflection. In addition, sources at distances much larger than normally taken into account in noise maps might still contribute significantly. Since one of the main reasons for this is computational burden, an efficient engineering model for the diffraction of the sound over the roof tops is proposed, which considers multiple reflections, variation in building height, canyon width, façade roughness and different roof shapes. The model is fitted on an extensive set of full-wave numerical calculations of canyon-to-canyon sound propagation with configurations matching the distribution of streets and building geometries in a typical historically grown European city. This model allows calculating the background noise in the shielded areas of a city, which could then efficiently be used to improve existing noise mapping calculations. The model was validated by comparison to long-term measurements at 9 building façades whereof 3 were at inner yards in the city of Ghent, Belgium. At shielded façades, a strong improvement in prediction accuracy is obtained.

Keywords
Noise, Dwelling, Noise level, Mathematical model, Prediction, Reflection, Surface
National Category
Fluid Mechanics and Acoustics
Research subject
10 Road: Transport, society, policy and planning, 15 Road: Environment
Identifiers
urn:nbn:se:vti:diva-9364 (URN)10.3813/AAA.918789 (DOI)000343742800010 ()2-s2.0-84908132048 (Scopus ID)
Available from: 2016-05-25 Created: 2016-03-02 Last updated: 2017-11-30Bibliographically approved
Hornikx, M., Forssén, J., Botteldooren, D., Van Renterghem, T., Wei, W., Ögren, M. & Salomons, E. (2014). Urban background noise mapping: The multiple-reflection correction term. Acta Acoustica united with Acustica, 100(2), 293-305
Open this publication in new window or tab >>Urban background noise mapping: The multiple-reflection correction term
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2014 (English)In: Acta Acoustica united with Acustica, ISSN 1610-1928, E-ISSN 1861-9959, Vol. 100, no 2, p. 293-305Article in journal (Refereed) Published
Abstract [en]

Mapping of road traffic noise in urban areas according to standardized engineering calculation methods systematically results in an underestimation of noise levels at areas shielded from direct exposure to noise, such as inner yards. In most engineering methods, road traffic lanes are represented by point sources and noise levels are computed utilizing point-to-point propagation paths. For a better prediction of noise levels in shielded urban areas, an extension of engineering methods by an attenuation term Acan has been proposed, including multiple reflections of the urban environment both in the source and in the receiver area.

The present work has two main contributions for the ease of computing Acan. Firstly, it is shown by numerical calculations that Acan may be divided into independent source and receiver environment terms, As and Ar. Based on an equivalent free field analogy, the distance dependence of these terms may moreover be expressed analytically. Secondly, an analytical expression is proposed to compute As and Ar for 3D configurations from using 2D configurations only. The expression includes dependence of the street width-to-height ratio, the difference in building heights and the percentage of facade openings in the horizontal plane. For the expression to be valid, the source should be separated from the receiver environment by at least four times the street width.

Keywords
Noise, Measurement, Urban area, Calculation
National Category
Fluid Mechanics and Acoustics
Research subject
10 Road: Transport, society, policy and planning, 15 Road: Environment
Identifiers
urn:nbn:se:vti:diva-9340 (URN)10.3813/AAA.918709 (DOI)000333013200012 ()2-s2.0-84894560001 (Scopus ID)
Available from: 2017-04-12 Created: 2017-04-12 Last updated: 2017-04-18Bibliographically approved
Andersson, H., Jonsson, L. & Ögren, M. (2013). Benefit measures for noise abatement: calculations for road and rail traffic noise. European Transport Research Review, 5(3), 135-148
Open this publication in new window or tab >>Benefit measures for noise abatement: calculations for road and rail traffic noise
2013 (English)In: European Transport Research Review, ISSN 1867-0717, E-ISSN 1866-8887, Vol. 5, no 3, p. 135-148Article in journal (Refereed) Published
Abstract [en]

Purpose

The aim of this study is to estimate monetary abatement values for road and rail traffic noise that can be used for policy purposes. However, a main objective is to critically discuss the assumptions necessary to convert the monetary values elicited in willingness to pay (WTP) studies to values than can be use for policy purposes.

Methods

We employ the hedonic regression technique on Swedish data to elicit individuals' preferences for noise abatement. Our elicited values are then converted to policy values and critically examined based on findings from a literature review.

Results

We show that WTP for road and rail not only differs in levels but also that the relationship between the noise level and the marginal value differs between the two sources. We also show that a health cost component added to the WTP estimate, based on the assumption of uninformed property buyers, will be small but not negligible and that also modest differences in the assumption of the discount rates will have a significant effect on the estimated values.

Conclusions

The main implications from this study are: (i) WTP for road and railway noise abatement differs not only on absolute but also marginal levels, (ii) Even small differences in the chosen discount rate, which is necessary to convert WTP values from a hedonic price study to policy values, have large effects on the policy values, and (iii) We show how to add a health cost component to the WTP estimates in order for the monetary estimates to reflect the total social cost. However, we argue that the motivation for doing so is weak and that more research is needed on this issue.

National Category
Economics
Identifiers
urn:nbn:se:vti:diva-14715 (URN)10.1007/s12544-013-0091-3 (DOI)000209728100003 ()2-s2.0-84883829046 (Scopus ID)
Available from: 2019-12-05 Created: 2019-12-05 Last updated: 2019-12-05Bibliographically approved
Andersson, H. & Ögren, M. (2013). Charging the Polluters A Pricing Model for Road and Railway Noise. Journal of Transport Economics and Policy, 47, 313-333
Open this publication in new window or tab >>Charging the Polluters A Pricing Model for Road and Railway Noise
2013 (English)In: Journal of Transport Economics and Policy, ISSN 0022-5258, E-ISSN 1754-5951, Vol. 47, p. 313-333Article in journal (Refereed) Published
Abstract [en]

By combining standardised calculation methods for total noise levels and monetary estimates from well-established evaluation methods, this study outlines a model to estimate the short-run marginal cost (SRMC) for road and railway noise that is able to differentiate not only modes of transport, but also vehicles and technologies. Several sensitivity tests run for the SRMC show that estimates are insensitive to traffic volume, sensitive to the number of exposed individuals, and sensitive to the monetary values used. Results also show that the use of quiet technology can have a significant effect on the SRMC.

Keywords
Noise, Noise level, External effect, Cost, Tariff, Mathematical model, Road traffic, Rail traffic
National Category
Economics
Research subject
J00 Railway: General works, surveys, comprehensive works; J00 Railway: General works, surveys, comprehensive works, J13 Railway: Economics; J00 Railway: General works, surveys, comprehensive works, J11 Railway: Environment; 10 Road: Transport, society, policy and planning; 10 Road: Transport, society, policy and planning, 15 Road: Environment; 00 Road: General works, surveys, comprehensive works; 00 Road: General works, surveys, comprehensive works, 02 Road: Economics
Identifiers
urn:nbn:se:vti:diva-14710 (URN)000324842800001 ()2-s2.0-84886909195 (Scopus ID)
Available from: 2019-12-05 Created: 2019-12-05 Last updated: 2019-12-05Bibliographically approved
Andersson, H., Swärdh, J.-E. & Ögren, M. (2013). Efterfrågan på tystnad: skattning av betalningsviljan för icke-marginella förändringar av vägtrafikbuller. Trafikverket
Open this publication in new window or tab >>Efterfrågan på tystnad: skattning av betalningsviljan för icke-marginella förändringar av vägtrafikbuller
2013 (Swedish)Report (Other academic)
Abstract [sv]

Efterfrågan på tystnad från vägbullerexponering skattas i detta projekt baserat på båda stegen i en så kallad hedonisk modell. Vi använder data från sju olika kommuner runt om i Sverige. Baserat på efterfrågekurvan kan vi räkna ut betalningsviljor för icke-marginella förändringar i bullerexponering från vägtrafik. Dessa resultat har stor användning i samhällsekonomiska kalkyler inom transportsektorn. Våra skattningsresultat visar att betalningsviljan för en bullerreducering från 66 till 65 dB är 2211 kronor per individ och år och 477 kronor per individ och år för en bullerreducering från 56 till 55 dB. Resultaten visar ingen betalningsvilja för bullerreduceringar under 52,8 dB. För en bullerreducering från 66 dB till 52,8 dB och alla lägre bullernivåer är betalningsviljan 15 225 kronor. Denna summa är även kostnaden för att utsättas för 66 dB vägbuller per individ och år.

Place, publisher, year, edition, pages
Trafikverket, 2013. p. 22
Keywords
Noise, Willingness to pay, Residential area, Price, Income
National Category
Economics
Research subject
10 Road: Transport, society, policy and planning, 15 Road: Environment; 00 Road: General works, surveys, comprehensive works, 02 Road: Economics
Identifiers
urn:nbn:se:vti:diva-7394 (URN)
Note

Slutrapport inom projektet Väsmage finansierat av Trafikverket.

Available from: 2014-11-04 Created: 2014-11-04 Last updated: 2016-02-05Bibliographically approved
Ögren, M. (2013). Externt buller från mitträfflor. Linköping: Statens väg- och transportforskningsinstitut
Open this publication in new window or tab >>Externt buller från mitträfflor
2013 (Swedish)Report (Other academic)
Alternative title[en]
External noise from milled centerline rumble strips
Abstract [sv]

Frästa räfflor i mitten på vägbanan används som en trafiksäkerhetshöjande åtgärd, och fungerar genom att föraren uppmärksammas på att fordonet håller på att passera mittlinjen via ljud och vibrationer i fordonet. Som en bieffekt genereras också extern ljud som riskerar att störa boende i närområdet. Denna rapport redovisar mätningar och beräkningar för att utröna hur ofta som fordon kör emot räfflorna vid en viss plats, samt vilka ljudnivåer det rör sig om från olika typer av fordon och på olika avstånd från vägen. Den första frågeställningen behandlades genom mätningar under totalt tio dygn på fyra olika platser, och resultatet visar på att totalt ca 0,2 till –1,0% av passerande fordon träffar räfflan, och att andelen ökar under natten. Den andra frågeställningen behandlades genom kontrollerade mätningar med tre olika fordon (personbil, personbil med lågprofildäck och lastbil) i olika hastigheter. Dessa data användes sedan för att beräkna vilka ljudnivåer man får på olika avstånd, och korrigerades med hjälp av ett exempel på en villas fasadisolering till inomhusnivåer. Resultatet visar att det endast är på korta avstånd som man riskerar att överskrida dagens riktvärden, men det kan ifrågasättas hur relevanta dessa är för impulsliknande ljud med kort varaktighet och tonal karaktär. VTI

Abstract [en]

Milled centerline rumble strips are used as a safety measure by alerting the driver via sound and vibration inside the vehicle. A secondary effect is that exterior noise is generated and that is a potential cause of annoyance and sleep disturbance for inhabitants living close to the road. This report describes a series of measurements and calculations with the aim of determining how many rumble strip hits that can be expected and what sound levels can be generated. The number of hits was determined using a total of ten days of measurements from four different locations and the results show that 0.2 to –1.0 per cent of all vehicle passages hit the rumble strip. The percentage of vehicles that hit the strip increases during night. The noise levels that are generated during a hit were determined by controlled pass-by measurements at different speeds with three different vehicles, a car with normal tires, a car with low profile tires and a truck (towing engine of semi-trailer). These measurements where then used to predict the outdoor and indoor noise levels. The calculations show that the Swedish guideline values may be exceeded at short distances, but it may be questioned if the road traffic noise guidelines are valid for rumble strip hits, since the noise is both impulsive and tonal in character.

Place, publisher, year, edition, pages
Linköping: Statens väg- och transportforskningsinstitut, 2013. p. 31
Series
VTI notat ; 13-2009
Keywords
Rumble strip, Noise level, Measurement, Outside, Environment, Bullerremsor, Bullernivå, Mätning, Utsida, Miljö
National Category
Infrastructure Engineering
Research subject
10 Road: Transport, society, policy and planning, 15 Road: Environment
Identifiers
urn:nbn:se:vti:diva-609 (URN)
Available from: 2013-12-03 Created: 2013-12-03 Last updated: 2014-10-03Bibliographically approved
Jerson, T. & Ögren, M. (2012). Elmotorvagn Coradia Duplex - Littera X40: indata till beräkningsmodellerna NMT96 och Nord 2000. Göteborg: WSP Akustik
Open this publication in new window or tab >>Elmotorvagn Coradia Duplex - Littera X40: indata till beräkningsmodellerna NMT96 och Nord 2000
2012 (Swedish)Report (Other academic)
Abstract [sv]

Resultaten från bullermätningarna visar att den aktuella motorvagnstypen X40 har lägre bulleremission än befintliga tågtyper som t.ex. snabbtåget X2. I diagrammen 1 och 2 redovisas X2-tågets predikterade ljudnivåer i jämförelse med mätresultaten från X40-passager.

Erhållna data har normaliserats enligt beräkningsmodellerna NMT96 och Nord 2000 och ingångsdata för beräkningar av bullerimmission från elmotorvagn X40 redovisas i tabeller 6 och 7 i avsnitt 6 ”Indata beräkningsmodeller”.

Place, publisher, year, edition, pages
Göteborg: WSP Akustik, 2012. p. 15
Keywords
Noise, Noise level, Train, Passenger train, Measurement, In situ, Buller, Bullernivå, Tåg, Passagerartåg, Mätning, In situ
National Category
Infrastructure Engineering
Research subject
Railway: General works, surveys, comprehensive works, Railway: Environment
Identifiers
urn:nbn:se:vti:diva-5276 (URN)
Available from: 2013-12-03 Created: 2013-12-03 Last updated: 2014-09-18Bibliographically approved
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