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  • 1.
    Arvidsson, Anna K
    et al.
    Swedish National Road and Transport Research Institute, Infrastructure, Infrastructure maintenance.
    Blomqvist, Göran
    Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.
    Erlingsson, Sigurdur
    Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
    Hellman, Fredrik
    Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
    Jägerbrand, Annika
    Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute, Infrastructure, Infrastructure maintenance.
    Klimatanpassning av vägkonstruktion, drift och underhåll2012Report (Other academic)
    Abstract [en]

    The global climate change is a reality and affecting society and transport systems. Climate change adaptation of transport systems will make the means of transportation more resilient and decrease the risk and magnitude of disruptions. Generally, climate change adaptations in road construction, operation and maintenance will need relatively large changes, but there is a shortage of the specific knowledge required as to what steps need to be taken, when and where, before measures can actually be implemented. Since climate change effects vary among Sweden's climatic zones, the impact of climate change on the road behavior and longevity is extremely difficult to predict. The need for winter maintenance in Sweden will generally decrease due to the warmer climate. Ploughing frequency will probably decrease as well, but preparedness should not be reduced too much since occasions with more extreme instances will increase. In order to succeed in making the road transport system resilient to climate change, we conclude that there is a need to develop more knowledge about the impact on the road infrastructure system as well as the operation and maintenance of the system including how to adapt through different types of variable and flexible climate adaptation measures and the effects of extreme weather events.

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  • 2.
    Arvidsson, Anna K
    et al.
    Swedish National Road and Transport Research Institute, Infrastructure, Infrastructure maintenance.
    Blomqvist, Göran
    Swedish National Road and Transport Research Institute, Society, environment and transport, Environment.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute, Infrastructure.
    The impact of climate change on the use of anti- and de-icing salt in Sweden2012In: Transportation Research Circular: Winter Maintenance and Surface Transportation Weather, 2012, p. -10Conference paper (Refereed)
    Abstract [en]

    The future needs for winter maintenance will probably be influenced by the climate change in different ways in different parts of the world. As Sweden is a country with several climate zones, the influence of climate change on winter maintenance will therefore differ between regions within the country. To understand the influence of climate change on the future needs of salt consumption in winter maintenance, modeled road weather data were calculated in the IRWIN project (a joint research project through ERA-NET ROAD funded by the 6th Framework Program of the European Commission), where climate change scenarios from ECHAM5 (the fifth generation of the European Centre Hamburg Model general circulation model from the Max-Planck Institute for Meteorology) were combined with field data from the road weather information system in Sweden.

    These modeled road weather data were used in project KLIVIN (the study presented here) in three Swedish regions (Gothenburg, Stockholm, and Sundsvall) and was combined with the Swedish winter severity index in order to calculate the trends of future salt needs. In this study the needs of salt for each of the three investigated regions were calculated in 30-year periods between 1970 and 2100. The results show that salt use related to snowfall will decrease in all three regions, while the salt use related to temperature will increase in the northernmost region (Sundsvall) and show a small decrease in the two other regions (Gothenburg and Stockholm).

  • 3.
    Björketun, U
    et al.
    Swedish National Road and Transport Research Institute.
    Karlsson, J-Å
    Swedish National Road and Transport Research Institute.
    Öberg, G
    Swedish National Road and Transport Research Institute.
    Inverkan på väglaget och konsekvenser för trafikanten och väghållaren: Försök med osaltade vägar vintern 1982/83 (Effects on road conditions and consequences for road users and road maintenance authorities: Experiments with unsalted roads during the winter 1982/83)1984Report (Other academic)
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  • 4.
    Burtwell, Marilyn
    et al.
    TRL Limited, United Kingdom.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    COST Action 344: Improvements to snow and ice control on European roads and bridges2002In: PIARC 2002 XIth International Winter Road Congress 28-31 January 2002 - Sapporo (Japan): Reprints from proceedings of oral presentations, Linköping: Statens väg- och transportforskningsinstitut, 2002, p. 9-Conference paper (Other academic)
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  • 5.
    Bäckman, Lars
    et al.
    Swedish National Road and Transport Research Institute.
    Gregersen, Nils-Petter
    Swedish National Road and Transport Research Institute.
    Nilsson, Göran
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Hedlund, Staffan
    Jutengren, Kurt
    Swedish National Road and Transport Research Institute.
    Försök med saltfria vägar och gator på Gotland: Lägesrapport i oktober 19871987Report (Other academic)
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  • 6.
    Carlsson, Arne
    et al.
    Swedish National Road and Transport Research Institute.
    Centrell, Per
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Dubbdäck: Samhällsekonomiska konsekvenser1995Report (Other academic)
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  • 7.
    Carlsson, Arne
    et al.
    Swedish National Road and Transport Research Institute.
    Centrell, Per
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Studded tyres: socio-economic calculations1995Report (Other academic)
    Abstract [en]

    The goal with this investigation is a revision of earlier investigations of studded tyres, i.e. the socio-economic consequences that may be expected from a ban on such tyres.

    The calculations were made for winter 1993/1994 and for winter 1999/2000. The conditions in winter 1993/1994 form the basis for the calculations, a quite normal winter. The conditions in 1999/20 00 are the same, except for the assumptions that all those using studded tyres will then be using lightweight studs and that wear resistant pavements will be more common. Everything else, for example winter maintenance will be the same as in 1993/1994.

    The following effects are included:

    Accidents (direct: at slipperiness. indirect: because of pavement wear)

    Road wear (pavement and road markings, cleaning signs)

    Car costs (tyres/rims, fuel consumption, washing)

    Environment (car washing)

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  • 8.
    Carlsson, Arne
    et al.
    Swedish National Road and Transport Research Institute.
    Nilsson, Göran
    Swedish National Road and Transport Research Institute.
    Brüde, Ulf
    Swedish National Road and Transport Research Institute.
    Hammarström, Ulf
    Swedish National Road and Transport Research Institute.
    Sandberg, Ulf
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Cedersund, Hans-Åke
    Swedish National Road and Transport Research Institute.
    Möller, Staffan
    Swedish National Road and Transport Research Institute.
    Effektsamband i Vägverkets effektkatalogserie: Planprojekt1990Report (Other academic)
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  • 9.
    Carlsson, Arne
    et al.
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Vinterdäck: Effekter av olika regelförslag1995Report (Other academic)
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  • 10.
    Carlsson, G
    et al.
    Swedish National Road and Transport Research Institute.
    Öberg, G
    Swedish National Road and Transport Research Institute.
    Dubbdäcks effekt på fordons restider1976Report (Other academic)
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  • 11.
    Carlsson, G
    et al.
    Swedish National Road and Transport Research Institute.
    Öberg, G
    Swedish National Road and Transport Research Institute.
    Hastighetsuppföljning av 70-gränsen under sommarhalvåret 19711972Report (Other academic)
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  • 12.
    Carlsson, G
    et al.
    Swedish National Road and Transport Research Institute.
    Öberg, G
    Swedish National Road and Transport Research Institute.
    Ytbehandling av grusvägar. Trafik- och friktionsstudier1977Report (Other academic)
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  • 13.
    Gregersen, Nils-Petter
    et al.
    Swedish National Road and Transport Research Institute.
    Nilsson, Göran
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Försök med saltfria vägar och gator på Gotland1988Report (Other academic)
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  • 14.
    Gustafson, Kent
    et al.
    Swedish National Road and Transport Research Institute.
    Olofsson, Ingemar
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Winter maintenance in Sweden: 4 papers from Transportation Research Board 68th annual meeting, January 24, 19891990Report (Other academic)
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  • 15.
    Gustafson, Kent
    et al.
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    MINSALT - a 5-year study to minimize the negative effects of salt1991Report (Other (popular science, discussion, etc.))
  • 16.
    Gustafson, Kent
    et al.
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Vinterväghållning i USA och Canada1989Report (Other academic)
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  • 17.
    Gustafson, Kent
    et al.
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Axelson, Lennart
    Swedish National Road and Transport Research Institute.
    Eriksson, Peter
    Swedish National Road and Transport Research Institute.
    Referat från "3rd International symposium on snow removal and ice control technology"1993Report (Other academic)
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  • 18.
    Gustafsson, Mats
    et al.
    Swedish National Road and Transport Research Institute.
    Berglund, Carl Magnus
    Swedish National Road and Transport Research Institute.
    Forsberg, Bertil
    Swedish National Road and Transport Research Institute.
    Forsberg, Inger
    Swedish National Road and Transport Research Institute.
    Forward, Sonja
    Swedish National Road and Transport Research Institute.
    Grudemo, Stefan
    Swedish National Road and Transport Research Institute.
    Hammarström, Ulf
    Swedish National Road and Transport Research Institute.
    Hjort, Mattias
    Swedish National Road and Transport Research Institute.
    Jacobson, Torbjörn
    Swedish National Road and Transport Research Institute.
    Johansson, Christer
    Ljungman, Anders
    Nordström, Olle
    Swedish National Road and Transport Research Institute.
    Sandberg, Ulf
    Swedish National Road and Transport Research Institute.
    Wiklund, Mats
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Effekter av vinterdäck: en kunskapsöversikt2006Report (Other academic)
    Abstract [en]

    Choice of winter tyres has, from mainly being a matter of safety and economic costs for wearing of road pavements, during later years also become a matter of inhalable particles formed during pavement wear from studded tyres and their negative effects on public health. Further, the tyres' effects on environment and noise have been illustrated in several studies. The issue is also complicated by the fact that tyre choice effects on traffic safety have several components, including such diverging parameters as friction and behaviour. Finally all aspects have to be evaluated from a socioeconomic point of view for society to be able to decide which kind of distribution of tyre types that is the most profitable. This report is a summary of current knowledge in this complex research field.

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  • 19.
    Hjort, Mattias
    et al.
    Swedish National Road and Transport Research Institute.
    Thorslund, Birgitta
    Swedish National Road and Transport Research Institute.
    Sundström, Jerker
    Swedish National Road and Transport Research Institute.
    Wiklund, Mats
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Bussars trafiksäkerhet vintertid2008Report (Other (popular science, discussion, etc.))
    Abstract [en]

    Earlier studies have shown that buses are overrepresented at accidents during winter road conditions compared to other vehicle types. Hence, the traffic safety of buses during the wintertime has been studied in more detail. The study comprised the following parts: - Gripping power studies on ice in VTI's tyre test facility. - Accident study and a survey of the use of tyre. - Focus group to gain knowledge about dangerous situations. - Driving simulator study to test the importance of the tyres during problematic situations.

    Tests in VTI's tyre test facility on smooth ice did not show any significant difference between summer tyres and non-studded winter tyres, while studded tyres exhibit a better ice grip than non-studded tyres. Nor did driving simulator tests when driving on ice covered road under the influence of heavy wind from the side show a difference between summer tyres and non-studded winter tyres. Also in these tests the studded tyres were superior to the non-studded. If studded tyres are used only on one axle, the driving simulator study showed that during side wind the ability to steer is important. The accident study showed that the buses that have summer tyres on the steering axle and winter tyres on the drivé axle has the lowest estimated accident risk, although it is not statistically significant. The buses equipped with studded tyres on both axles could not be statistically analysed since only 2 accidents occurred on bare roadways, and none on icy/snowy roadways, while at the same time the buses in this category drive a lot on icy/snowy roadways. This probably makes these buses the safest on winter roadways. From the focus groups it was clear that the time table has a great influence on the creating of stress and the demands on the drivers to keep the speed even during slippery roadways. Many bus drivers experience large problems with bad snow clearance, or other winter maintenance. At the same time there is a large consciousness among the drivers that it is always their own way of handling the vehicle that is the determining factor for traffic safety. The drivers were expressing a lack of further education and practical exercises with buses on slippery roads.

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  • 20.
    Hjort, Mattias
    et al.
    Swedish National Road and Transport Research Institute, Traffic and road users, Vehicle technology and simulation.
    Wiklund, Mats
    Swedish National Road and Transport Research Institute, Infrastructure, Infrastructure maintenance.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute, Infrastructure, Infrastructure maintenance.
    Bus accidents in wintertime2010In: PIARC 2010 XIII International Winter Road Congress, February 8-11, 2010, Quebec, Canada: proceedings, 2010Conference paper (Refereed)
    Abstract [en]

    Buses in Sweden have a low accident risk. However, statistics from 1996 - 2002 indicate that the number of bus accidents in Sweden with personal injuries have been increasing by 4% yearly. Buses also have a higher percentage of accidents that occur on ice/snow covered roads than other vehicles. In Sweden passenger cars must be equipped with winter tyres during the winter period. There is no such regulation for heavy vehicles, and many buses are using summer tyres all around the year. The present project had the purpose of looking at the bus-winter problem in more detail, with the main focus on tyres. Four different studies were carried out: tyre tests, focus group discussions, driving simulator tests and an accident study. Here is given a short summary concerning methods and conclusions of each sub project.

    Tyre tests on smooth ice did not show any significant difference between summer tyres and non-studded winter tyres, while studded tyres exhibits a better ice grip than non-studded tyres. Nor did driving simulator tests with driving on ice covered road under the influence of heavy wind from the side show a difference between summer tyres and non-studded winter tyres. Also in these tests studded tyres were superior to non-studded. Accident statistics indicate that buses with summer tyres on the steering axle and winter tyres on the drive axle have the lowest estimated accident risk, which is in accordance with the results in a previous study. The results are however not statistically significant due the low number of accidents. Three focus groups were carried out and the importance of the tyres for traffic safety during winter was discussed. It is however hard from the gathered discussion material to estimate just how important the tyres really are. The results do not warrant a winter tyre regulation for heavy vehicles, and a restriction of the use of studded tyres for buses would probably have negative consequences on traffic safety.

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  • 21.
    Ihs, Anita
    et al.
    Swedish National Road and Transport Research Institute.
    Gustafson, Kent
    Swedish National Road and Transport Research Institute.
    Persson, Kerstin
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Wretling, Peter
    Swedish National Road and Transport Research Institute.
    Haveriutredning: vinterväghållning1996Report (Other academic)
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  • 22.
    Ihs, Anita
    et al.
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Wågberg, Lars-Göran
    Swedish National Road and Transport Research Institute.
    Trafikanters krav på vägars tillstånd: en litteraturstudie rörande trafikantenkäter och trafikintervjuer2007Report (Other academic)
    Abstract [sv]

    Today the Swedish Road Administration (SRA) regularly follows up the condition of the state roads by means of road surface measurements. It is mainly rut depth (mm) and roughness expressed in the measure International Roughness Index (IRI, mm/m) that is the bases for assessment of the road surface condition. Based on these measurements it can generally be said that the condition of the roads neither have considerably improved nor become considerably worse over the years. The trend however looks a bit different in the different SRA Regions. At the same time it is also yearly investigated how content or discontent the road users are with the maintenance of the state roads. The road users are asked about their opinion on the operation and maintenance of the roads in general as well as more specifically about their opinion concerning rutting and unevenness, i.e. the factors that are followed up by measurements. The general tendency, except for the last year, is the percentage of satisfied road users is decreasing. The percentage of satisfied road users is also low. This applies not least that the professional drivers. The agreement between the objective measurements of the condition of roads (or rather the condition measures that are used) that are done and the opinions given by the road users is not very good. There is reason to go deeper into this question and examine what requirements and expectations the road users have on the roads/road surface condition and also what measures are needed to describe the condition in a satisfactory way.

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  • 23.
    Lager, H
    et al.
    Swedish National Road and Transport Research Institute.
    Öberg, G
    Swedish National Road and Transport Research Institute.
    Dokumentation av DTA-2-program. Del 1 och 21977Report (Other academic)
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  • 24.
    Möller, Staffan
    et al.
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Instruktion för väglagsobservationer1990Report (Other academic)
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  • 25.
    Nordström, Olle
    et al.
    Swedish National Road and Transport Research Institute.
    Wallman, Carl-Gustaf
    Swedish National Road and Transport Research Institute.
    Wiklund, Mats
    Swedish National Road and Transport Research Institute.
    Wretling, Peter
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Tunga fordons däckanvändning: effekter vid vinterväglag1999Report (Other academic)
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  • 26.
    Nordström, Olle
    et al.
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Tunga fordons däckanvändning: trafiksäkerhet. Etapp 11997Report (Other academic)
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  • 27.
    Ragnarsson, Gunilla
    et al.
    Swedish National Road and Transport Research Institute.
    Junghard, Ola
    Swedish National Road and Transport Research Institute.
    Wretling, Peter
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Utveckling av modellen för uppföljning av vinterväghållningsåtgärder på länsnivå1991Report (Other academic)
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  • 28.
    Ragnarsson, Gunilla
    et al.
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Inverkan av snöväder på väglag, fordonshastighet och bränsleförbrukning (The influence of snow fall on road condition, vehicle speed and fuel consumption)1986Report (Other academic)
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  • 29.
    Schandersson, Rein
    et al.
    Swedish National Road and Transport Research Institute.
    Magnusson, Georg
    Swedish National Road and Transport Research Institute.
    Wågberg, Lars-Göran
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Betydelsen av olika karakteristika hos beläggningsytan för trafik och omgivning. Ett försök till strukturering1993Report (Other academic)
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  • 30.
    Sjölinder, Kent
    et al.
    Swedish National Road and Transport Research Institute.
    Velin, Hans
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Vägytans inverkan på trafiksäkerheten. Data från 1986 och 19871997Report (Other academic)
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  • 31.
    Thunberg, B
    et al.
    Swedish National Road and Transport Research Institute.
    Schandersson, R
    Swedish National Road and Transport Research Institute.
    Öberg, G
    Swedish National Road and Transport Research Institute.
    Vinterväghållning i tätort: Fyra projekt inriktade på trafiksäkerhet och framkomlighet1985Report (Other academic)
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  • 32.
    Velin, Hans
    et al.
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Analys av trafikolyckor före och efter beläggningsåtgärd: beläggningsår 1997 och 1998 i Vägverket Region Väst2002Report (Other academic)
    Abstract [en]

    This is the third study of the effects on traffic accidents of resurfacing measures that Region West of the Swedish National Road Administration has commissioned. All three have been carried out as before-and-after studies with two years before and two years after the measure.

    In the study reported here, the third in order, roads resurfaced during 1997 and 1998 were examined.

    When the two resurfacing years are examined individually, an accident increase is obtained for all police-reported accidents after resurfacing. If personal injury accidents are analysed separately, accident decreases are obtained for both resurfacing years: the number of accidents decreases also when only accidents with seriously injured and killed are analysed. None of the results are statistically verified.

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  • 33.
    Wallman, Carl-Gustaf
    et al.
    Swedish National Road and Transport Research Institute.
    Möller, Staffan
    Swedish National Road and Transport Research Institute.
    Blomqvist, Göran
    Swedish National Road and Transport Research Institute.
    Gustafsson, Mats
    Swedish National Road and Transport Research Institute.
    Niska, Anna
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Berglund, Carl Magnus
    Swedish National Road and Transport Research Institute.
    Karlsson, Bo O
    Swedish National Road and Transport Research Institute.
    Tema Vintermodell: etapp 2, huvudrapport2006Report (Other academic)
    Abstract [en]

    The aim of the Winter Model is to estimate and put a value on the most important impacts of the strategies and measures in winter road management for road users, road management authorities and society at large. The main report itself is a summary of the reports that describe the submodels in the Winter Model. The hub of the model is the Road Condition Model which, on the basis of weather data, undertaken road management measures and traffic, calculates road conditions hour by hour during the winter season. The Road Condition Model controls calculations in the effect models: Accident Model, Accessibility Model, Vehicle Cost Model, Environment Model and Model for Road Management Costs. The Accident Model calculates accident rates, accident types and consequences, all coupled with different road conditions and their duration. The Accessibility Model calculates the effect of different road conditions on mean speeds and trip times. The Vehicle Cost Model calculates the costs of fuel consumption and corrosion due to road salt. The Environment Model calculates the impacts on roadside vegetation due to road salt. The Model for Road Management Costs calculates both the direct costs of the measures and the costs of damage to, and wear of, road surfacing, road markings etc as a result of road management measures.

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  • 34.
    Wallman, Carl-Gustaf
    et al.
    Swedish National Road and Transport Research Institute.
    Wretling, Peter
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Effects of winter road maintenance: state-of-the-art1997Report (Other academic)
    Abstract [en]

    The study constitutes the basis for the model to be used as a guideline for determining winter road standards within the framework of the public economy. Driving speeds vary widely on winter roads. However, it is estimated that passenger cars travel at 75-–90 % of the speeds they normally travel at on bare roads. In order to maintain a consistent stopping distance, speeds should virtually be halved. The appearance of the road has a greater affect on the reduction in speed than friction/road traction. Precipitation entails a much greater reduction than slippery road surfaces alone. Accident rates on winter roads vary greatly. However, studies based on the observation of road conditions and traffic measurements show an increased risk on icy/snowy roads. The more unusual these conditions, the greater the risk. Aggregated studies do not support the presumption of increased risk in winter. Statistics from the Swedish Motor Vehicle Inspection Co. were analysed as a result of notations of rust defects that caused cars to fail inspection. In Västervik, where roads are salted, cars fail inspection 2–4times more often than on Gotland, where salt is not used. Experts estimate that the life expectancy of cars would increase by 25 % if roads were not salted. Corrosion costs will continue to be high since new corrosion problems occur in conjunction with the effects on electronic equipment. Many breaches of knowledge are identified.

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  • 35.
    Wallman, Carl-Gustaf
    et al.
    Swedish National Road and Transport Research Institute.
    Wretling, Peter
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Effekter av vinterväghållning: State-of-the-Art1997Report (Other academic)
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  • 36.
    Wretling, Peter
    et al.
    Swedish National Road and Transport Research Institute.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Effekt på väglag och hastighet av osaltad vinterväghållning och sänkt hastighetsgräns: försök på E4 i Region Norr vintrarna 1994/95, 1995/96 och 1996/971997Report (Other academic)
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  • 37.
    Öberg, G
    Swedish National Road and Transport Research Institute.
    Bilisternas hastighetsanpassning till olika väglags- och friktionsförhållanden: Försök med osaltade vägar vintern 1980/811982Report (Other academic)
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    FULLTEXT01
  • 38.
    Öberg, G
    Swedish National Road and Transport Research Institute.
    Effekter av saltning och moddavröjning: En förstudie av hastighet och friktion1978Report (Other academic)
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    FULLTEXT01
  • 39.
    Öberg, G
    Swedish National Road and Transport Research Institute.
    Effekter av sandning: Trafik- och friktionsstudier1978Report (Other academic)
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    FULLTEXT01
  • 40.
    Öberg, G
    Swedish National Road and Transport Research Institute.
    Friktion och reshastighet på vägar med olika vinterväghållning1981Report (Other academic)
    Download full text (pdf)
    FULLTEXT01
  • 41.
    Öberg, G
    Swedish National Road and Transport Research Institute.
    Influence on speed and fuel consumption of changed speed limits (110 to 90 km/h)1982Report (Other (popular science, discussion, etc.))
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  • 42.
    Öberg, G
    Swedish National Road and Transport Research Institute.
    Inverkan på vägbanans friktion och väglag: Försök med osaltade vägar vintern 1981/82 (The effects on road friction and road condition: Experiments with unsalted roads in the winter 1981/82)1983Report (Other academic)
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  • 43.
    Öberg, G
    Swedish National Road and Transport Research Institute.
    Skyddsanordningar och förhandsinformation vid fast vägarbete på motorväg: Effekter på fordonshastighet och körfältsbyte1979Report (Other academic)
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    FULLTEXT01
  • 44.
    Öberg, G
    Swedish National Road and Transport Research Institute.
    Vägarbete på motorväg: Redovisning av planprojekt1978Report (Other academic)
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    FULLTEXT01
  • 45.
    Öberg, G
    et al.
    Swedish National Road and Transport Research Institute.
    Carlsson, G
    Swedish National Road and Transport Research Institute.
    Sänkning av högsta tillåten hastighet från 110 till 90 km/h under sommaren 1979: Effekt på hastighet och bensinförbrukning1980Report (Other academic)
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  • 46.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Bränsleförbrukning vid olika hastighetsgränser på typvägar. Detaljerade beräkningsresultat för olika typfordon1986Report (Other academic)
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  • 47.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Dubbade och odubbade personbilars reshastighet1989Report (Other academic)
    Download full text (pdf)
    FULLTEXT01
  • 48.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Dubbdäck och vinterväghållning1992Report (Other academic)
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    FULLTEXT01
  • 49.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Fältförsök med osaltad del på E4 i Västerbotten: Lägesrapport med resultat från förevintern 1986/871987Report (Other academic)
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  • 50.
    Öberg, Gudrun
    Swedish National Road and Transport Research Institute.
    Förändrade kostnader vid övergång från kemisk till mekanisk halkbekämpning: Beräkning och antaganden utifrån tidigare undersökningar1987Report (Other academic)
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