| 1. |
- Aakjer Nielsen, Michael
(författare)
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Accidents on rural roads in Denmark
- 2000
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Ingår i: Proceedings of Traffic Safety on Two Continents. Conference in Malmö, Sweden, September 20-22, 1999. - Linköping : Statens väg- och transportforskningsinstitut. ; , s. 1-16
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 2. |
- Aakjer Nielsen, Michael, et al.
(författare)
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Signing and marking of substandard horizontal curves on rural roads
- 1998
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Ingår i: Proceedings of Road safety in Europe. Conference in Bergisch Gladbach, Germany, September 21-23, 1998. - Linköping : Statens väg- och transportforskningsinstitut. ; , s. 25-38
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 3. |
- Abate, Megersa, 1980-
(författare)
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Does fuel price affect trucking industry’s network characteristics? : evidence from Denmark
- 2014
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- The 2000s were dominated by rising fuel prices and economic recession. Both had an impact on the structure of the trucking industry and how freight was moved. This paper examines how fuel prices shaped trucking industry’s network characteristics such as the average length of haul, average load, and capacity utilization. In particular, we show the effect of fuel price on average length of haul using 29 quarterly independent surveys from the Danish heavy goods vehicle (HGV) trip diary from 2004 to 2011. The results show that the average length of haul is sensitive to changes in fuel price: a DKK 1 (0.18$) increase in diesel price/liter leads to a 4 percent decrease in the average length of haul in the 2004-2007 period. This implies that firms improve transport efficiency by reducing the number of kilometers needed to transport a tonne of cargo as a short run response to fuel price increases. This result, however, is not confirmed for the years following the 2008 financial crisis. It also depends on where in the distribution of the average length of haul one looks.
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| 4. |
- Abate, Megersa, 1980-
(författare)
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Economic effects of air transport market liberalization in Africa
- 2014
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Although the aviation industry is increasingly becoming important for Africa's economic development and integration, the ability of airlines to access foreign markets remains hindered by restrictive regulatory policies. Attempts have been made to fully liberalize the intra-African air transport market. Except for general assertions about the merits/demerits of liberalization, our empirical understanding of the welfare effects of such polices in Africa remains rudimentary. This study empirically measures the economic effects of air transport liberalization, mainly on two supply side variables: fare and service quality, measured as departure frequency. The results show up to 40 % increase in departure frequency in routes that experienced some type of liberalization compared to those governed by restrictive bilateral air service agreements. While the effect of liberalization is substantial in improving service quality, there is no evidence of its fare reducing effect.
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| 5. |
- Abate, Megersa, 1980-, et al.
(författare)
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Joint econometric models of freight transport chain and shipment size choice
- 2014
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- In freight transportation, decisions regarding the choice of transport mode (or chains of modes) and shipment size are closely linked. Building on this basic insight, in this paper we estimate and review various joint econometric models using the Swedish National Commodity Flow surveys. Robust parameter estimates from this exercise will be used to update the current deterministic Swedish national freight model system (the SAMGODS model) to a stochastic one.
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| 6. |
- Abbas, Khaled A, et al.
(författare)
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A generic approach for in depth statistical investigation of accident characteristics and causes
- 2001
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Ingår i: Proceedings of the conference Traffic Safety on Three Continents. - Linköping : Statens väg- och transportforskningsinstitut. ; , s. 653-665
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- The main aim of this research is to develop a generic approach for the utilization of statistical methods to conduct depth investigation of road accident characteristics and causes. This approach is applied in an effort to analyse the 1998 accident database for the main rural roads in Egypt. This database is composed of traffic accident data collected for 14 road sections representing nine major roads of the Egyptian rural road network. The proposed approach is composed of two main stages of analysis. Within each stage, several analytical steps are conducted. The first stage is mainly concerned with developing cluster bar charts, where different characteristics and causes of accidents are portrayed in relation to variations in the three main accident contributing factors, namely types of roads, vehicles and drivers. The second stage is concerned with conducting in-depth statistical analysis of the collected accident data. Within this stage, four levels of statistical investigations were conducted. These are meant to examine a number of issues.
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| 7. |
- Abbas, Khaled A
(författare)
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Environmentally sustainable transport strategies : the way forward in metropolitan cities
- 2001
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Ingår i: Proceedings of the conference Traffic Safety on Three Continents. - Linköping : Statens väg- och transportforskningsinstitut. ; , s. 780-791
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- This paper is concerned with one of the three requirements of a sustainable transport system, namely the environmental dimension. It starts by presenting components and interactions of the transport and traffic systems using causal diagrams. Generic traffic problems are identified and their causes categorized. A classification of demand and supply-based policies and measures that can be used in designing environmentally sustainable transport strategies is depicted. Such strategies are targeted towards minimizing the generic traffic problems encountered in metropolitan cities, i.e., traffic congestion, accidents, environmental degradation and energy inefficiencies. In this paper, Travel Demand and Land Use Management are considered as two of the basic pillars for designing environmentally sustainable transport strategies. Criteria for comparing demand versus supply-based policies are suggested. These are applied to assess the benefits and limitations of each policy, hence assisting decision makers in the prioritization and choice of such policies.
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| 8. |
- Abdel-Aty, M A, et al.
(författare)
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Developing crash predictive models for a principal arterial
- 2000
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Ingår i: Proceedings of Traffic Safety on Two Continents. Conference in Malmö, Sweden, September 20-22, 1999. - Linköping : Statens väg- och transportforskningsinstitut. ; , s. 179-194
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 9. |
- Abdel-Aty, MA, et al.
(författare)
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Using GIS to locate the high risk driver population
- 2000
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Ingår i: Proceedings of Traffic Safety on Two Continents. Conference in Malmö, Sweden, September 20-22, 1999. - Linköping : Statens väg- och transportforskningsinstitut. ; , s. 111-126
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)
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| 10. |
- Achit, Hamza, et al.
(författare)
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Physical Impairment and Medical Care Spending by Road Accident Victims
- 2013
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Ingår i: Proceedings of the 16th International Conference Road Safety on Four Continents. - Linköping : Statens väg- och transportforskningsinstitut.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- In addition to the immediate physical injuries they suffer, road accident victims may also be subject to ongoing deterioration of their state of health in terms of permanent physical and mental problems, disabilities, etc. These various health shocks entail recourse to care and treatment, the upshot being increases in health expenses. In France little is known about the financial impact of accidents on victims. This paper uses data from a sample of 777 individuals suffering from road accident-induced physical impairment. Information about these individuals includes details of their personal and socioprofessional characteristics, together with data provided by their health insurance offices regarding their use of treatment and their medical expenses. The analysis of these data reveals that the costs incurred by road accident victims are significantly associated with such factors as age, seriousness of impairment, and marital status. Interaction effects are also noted between these explanatory factors: for example, the effect of the seriousness of impairment on the costs involved differs according to the age of the victim.
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