CTR Research Themes
Dynamic modelling of road traffic
CTR works with microscopic and mesoscopic simulation models of road driver-vehicle units as well as hybrid combinations of such models. We have developed microscopic models of Swedish motorway traffic and calibrated and applied several other microscopic models. Our in-house mesoscopic simulator MEZZO is the platform applied in several of our research projects.
Traffic information and control
Based on traffic simulation and driver choice modelling we study the effect of traffic information on queue development and dissipation after incidents.
Public transport operation
Where public transport operates in mixed traffic it interacts with other traffic. Mesoscopic simulation is used to study effects of bus bays, bus lanes, signal priorities and operations strategies on public transport and on other traffic.
Realistic traffic in driving simulators
VTI in Linkoping has several advanced moving-base driving simulators. Microscopic traffic simulation is developed to create realistic surrounding traffic in driving simulators.
Data collection, processing and analysis
Our knowledge of traffic behaviour is based on observations collected by different sensor devices such as inductive loops, radar, cameras etc. This data needs to be fused and processed to estimate flows, speed and travel times.
Energy consumption, emissions and noise
Fuel consumption, emissions and noise from cars depend heavily on interactions in traffic causing braking and accelerations. Microscopic simulation is used to analyse network effects.
Effects of ITS
Using microscopic simulation we evaluate effects of Intelligent Traffic Systems and especially Driver Support such as intelligent speed adaptation and lane departure warning.
Traffic assignment and studies of alternative routes depends on knowledge of origins and destinations of vehicles and how they vary over time of day. So called OD matrices are estimated based on home surveys and traffic counts.