Trafiksäkerhetseffekter av sänkt bashastighet i tätort till 40 km/tim


The aim of this study is to analyze the traffic safety effects if the default speed limit in urban areas are changed from 50 km/h to 40 km/h. Only accidents involving at least one motor vehicle have been included in the analysis. To estimate the national traffic safety effects, three different scenarios are studied. The scenarios are: (1) All streets in urban areas with speed limit 50 km/h are changed to 40 km/h, (2): 80% of the streets with speed limit 50km/h are changed to 40 km/h, 20% remain at 50 km/h, (3) 80% of the streets with speed limit 50km/h are changed to 40 km/h, 20% change to 60 km/h.

The results from the national analysis showed that, in the period of 2014–2016, an average of 65 people/year died in urban areas in accidents involving at least one motor vehicle, almost 1 300 were seriously injured and almost 200 very seriously injured. For the three different scenarios studied in the report, it was estimated that scenario 1 has the potential to save about 5 lives, 83 severely injured and 12 very seriously injured per year. For scenario 2, the effects are slightly smaller and about 4 lives per year can be saved, 66 seriously injured and 10 very seriously injured. In scenario 3, approximately 3 lives are saved per year, 55 severely injured and 8 very seriously injured. If larger changes of mean speed could be achieved (i.e. with speed reducing measures like road narrowing, bumps, enforcement etc.), larger effects can also be expected for the number of killed and seriously injured. If the mean speed is reduced by 5 or 10 km/h, 10 respectively 17 lives can be saved for scenario 1. When studying three municipalities in more detail, the results show that on the road network with changed speed limit from 50 km/h to 40 km/h, the proportion injured in collisions between unprotected road users and motor vehicles was higher before the change of speed limit than on road network where the speed limit remained 50 km/h.



Lunch seminar in transport economics

Professor Stef Proost, KU Leuven presents "What Role for Electric Vehicles in Decarbonizing the Car Sector in the EU?"

European Road Profile User's Group, ERPUG

Welcome to the sixth ERPUG meeting in Vilnius, Lithuania. 

Vision Zero for Sustainable Road Safety in the Baltic Sea Region

The second Vision Zero for Sustainable Road Safety in the Baltic Sea Region conference will be held in Tallinn, Estonia. VTI is part of the programme committee. 



VTI in research programme Triple F (Fossil Free Freight)

VTI is part of the consortium that has been commissioned by the Swedish Transport Administration to conduct a research programme with focus on fossil-free freight transports. The programme, called Triple F, will run for 12 years. Part of the programme is...


Several actors collaborating on HCT vehicles

The increasing amount of freight, congestion on the roads and environmental emissions are problems that high capacity vehicles, HCT vehicles, can contribute to solving.


VTI’s simulators are being used for emergency vehicles

Better accessibility and shorter response times for emergency vehicles – this is something that standardised, directed, traffic messages, transmitted over the 5G network can contribute. Within the EU project Nordic Way 2, a functioning prototype of such a...


Modal shift - a way to achieve the environmental objectives

Shifting freight transports from road to rail and water can contribute to achieving the Swedish environmental and climate objectives by 2030. How this could be done is something that VTI researchers and researchers from Gothenburg University are investigating...


Report regarding government commission on the costs of traffic to society has been submitted

Since 2013, the Swedish National Road and Transport Research Institute (VTI) has had several government commissions to produce documentation on the costs to society caused by traffic. On 1 November 2018, the agency reported its latest commission, Samkost 3....


International standardisation efforts have many advantages

VTI participates in several international standardisation committees. The work is important because it helps to ensure that standards can be adapted to Swedish conditions and it also provides access to valuable contacts and networks.