Tema Vintermodell: väglagsmodellen

Download
Staffan Möller

The Road Condition Model is the central part of the Winter Model. The reason for this is that it produces input data for most of the models that describe effects of different kinds, such as accident risks, travel times, fuel consumption and environmental impact. The road condition model supplies a condition assessment for a winter in the form of a road condition description on an hourly basis. According to the requirements of the client, the road condition model is confined to describing road conditions for two-lane roads with oncoming traffic in rural areas. At this stage, the model is also confined to describing road conditions in the traffic lane. No account is thus taken of hard shoulders, if any. The aim of the project is to develop a working prototype to the definite road condition model. The road condition model consists of the following sub models. The first five are related to maintenance measures taken and the last four to traffic and weather. 1. Anti-icing treatment. - 2. Snow ploughing combined with anti-icing treatment. - 3. Snow ploughing. - 4. Gritting. - 5. Grading. - 6. Rut development in hard-packed snow or thick ice. - 7. Condensation. - 8. Splashing from a wet road. - 9. Drying of a moist road.

MEET US


6
Oct

Open seminar with Mistra SAMS international scientific advisory...

Mistra SAMS international scientific advisory panel (ISAP) is visiting Stockholm, and the program will host an open seminar where the panel members will give talks in their area of expertise.
19-20
Oct

ERPUG 2017

The five year anniversary of  European Road Profile Users' Group (ERPUG) Forum will take place at Ramboll head quarter, Copenhagen, Denmark October 19-20, 2017. 

LATEST NEWS


2017-07-05

Vehicle Driver Monitoring: sleepiness and cognitive load

To prevent road crashes it is important to understand driver related contributing factors, which have been suggested to be the critical reason in 94 per cent of crashes. The overall aim of the project Vehicle Driver Monitoring has been to advance the...


2017-06-29

Tomas Svensson new director-general

Tomas Svensson was today appointed Director-General of VTI. Tomas has been acting Director-General since January 2017. 


2017-05-30

Crash testing bicycles at VTI

For the first time single bicycle crashes have been simulated at the VTI crash safety laboratory.


2017-05-15

A case study exploring firefighters’ and municipal officials’ preparedness for electrical vehicles

A VTI-study presents a social perspective on new vehicle technology. It explores the self-reported preparedness of the fire departments (i.e., rescue services) in Sweden’s three largest cities regarding rescue operations involving electrical vehicles (EVs).


2017-05-02

Pioneering research on and about bicycles at VTI

Under what circumstances might cyclists lose tyre grip? What actions could then be taken to prevent a crash? VTI is currently developing a theoretical model of the behaviour of bicycle tyres during braking and steering in different situations and on different...


2017-05-02

Virtual pedestrians create efficient stations

If more people are to choose sustainable travel, then the public transport stations of the future must be designed so that pedestrians can get where they are going quickly, without congestion or queues. The Swedish Road and Transport Research Institute (VTI)...