Utvärdering av ändrade hastighetsgränser: långtidseffekter på trafiksäkerhet

Download
Urban Björketun

The Swedish Transport Administration has since 2008 undertaken to review speed limits on the national road network. The aim of this study is predominantly to describe and analyse the long-term traffic safety effect of increased, as well as, reduced speed limits. The evaluation is based on accident rates from the accident data base Strada (Swedish Traffic Accident Data Acquisition) combined with information on roads from National Road database, NVDB. The present study is a before and after study with control group where the change in accident and injury outcome on roads with new speed limits is compared with the corresponding change in the control group. Results show an extensive reduction in fatalities on rural roads with reduced speed limit from 90 to 80 km/h where the number of fatalities decreased by 14 per year, while no significant changes were seen for the seriously injured. On motorways with an increased speed limit to 120 km/h, the number of seriously injured increased by about 15 per year, but the number of deaths is in principle unchanged. The number of seriously injured increased on all types of motorways, but the worst development was seen for narrow motorways (21.5 m wide). For 2 + 1 roads with decreased speed limit from 110 to 100 km/h, the injury accidents decreased by about 10 per year and the seriously injured decreased by about 16 per year. On 2 + 1 roads with increased speed limit from 90 to 100 km/h, the number of injury accidents increased by about 19 per year. In conclusion, the results show that in total about 17 lives per year have been saved on the road network with changed speed limits. The number of seriously injured remain in principle unchanged.

MEET US


7
Dec

Shipping and the environment – research meets reality

Centre for Transport Studies (CTS) in co-operation with Ports of Stockholm invite you to the seminar Shipping and the environment – research meets reality.

LATEST NEWS


2017-10-16

ERPUG Forum

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.


2017-09-29

Self-driving buses in Sweden next year?

A self-driving, fossil-free bus. This idea might become reality through a forthcoming collaborative project involving the Swedish National Road and Transport Research Institute (VTI), Linköping University and several other participants. The project group aim...


2017-09-29

New climate-proof solutions for hard surfaces in cities

High-density road infrastructure that emphasise maximum durability and minimum maintenance create inflexible systems, which put increased stress on urban trees and lead to increased risk for flooding. Over the past five years, the ‘Climate-proof solutions for...


2017-09-29

VTI is preparing for automated vehicles

Automation of traffic systems will lead to major changes. The European Union’s (EU) CoEXist research project began in June 2017 with the aim of preparing cities and road operators for the introduction of self-driving vehicles. The Swedish National Road and...


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.