Sökning: "Statens väg- och transportforskningsinstitut."
Visar resultat 11 - 15 av 25 avhandlingar innehållade orden Statens väg- och transportforskningsinstitut..
11. Costs in Swedish Public Transport : An analysis of cost drivers and cost efficiency in public transport contracts
Sammanfattning : During the last seven years, the total cost for Swedish public transport provision has increased by over 30 percent in real terms according to figures from the government agency Transport Analysis. A similar pattern is found if considering a longer time span. LÄS MER
12. Mechanistic-Empirical Modelling of Flexible Pavement Performance : Verifications Using APT Measurements
Sammanfattning : Mechanistic-Empirical (M-E) pavement design procedures are composed of a reliable response model to estimate the state of stress in the pavement and distress models in order to predict the different types of pavement distresses due to the prevailing traffic and environmental conditions. One of the main objectives of this study was to develop a response model based on multilayer elastic theory (MLET) with improved computational performance by optimizing the time consuming parts of the MLET processes. LÄS MER
13. Modeling pavement performance based on data from the Swedish LTPP database : predicting cracking and rutting
Sammanfattning : The roads in our society are in a state of constant degradation. The reasons for this are many, and therefore constructed to have a certain lifetime before being reconstructed. To minimize the cost of maintaining the important transport road network high quality prediction models are needed. LÄS MER
14. Reducing greenhouse gas emissions – Examples from the freight transport sector: Essays on economic growth, public policy instruments, and renewable energy
Sammanfattning : The overall aim of this thesis is to improve the understanding of if, and how, we can combat climate change and other non-wanted environmental changes alongside economic development. Paper I address this question by investigating the relationship between CO2 emissions and GDP per capita. LÄS MER
15. Evaluation of Adapted Passenger Cars for Drivers with Physical Disabilities
Sammanfattning : Driving can provide independent and efficient mobility. However, according to the driving license directive (91/439/EEC) are persons with locomotor impairments are only allowed drive if their disabilities can be compensated. Compensation can be realised by vehicle adaptations. LÄS MER