Potential för en energieffektivare väg- och gatubelysning: jämförelser mellan dimning och olika typer av ljuskällor

Annika Jägerbrand

In order to reduce energy use and its accompanying costs, it is important to have as energy-efficient road and street lighting as possible. The objectives of this project were to provide basic data for different energy efficiency measures for road and street lighting and to examine how the use of dimming and various light sources affects visibility. This study shows that there is potential to reduce the energy consumption of several of the existing road lightings by reducing power and still meet the requirements based on traffic safety, because the luminance and the illuminance we measured show that some of the values fall between the recommended classes. This study highlights four different types of dimming schedules based on different conditions in which the savings in kWh/year is between 19-50%. The results from a web survey based on photographs from roads with various lighting show that responses were not conclusive regarding the best visibility between light sources. However, the survey shows that more people (62.4-71.6%) choose ceramic metal halide lighting instead of high-pressure sodium in order to feel most comfortable when driving.



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. 

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.




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.


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...


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...


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...


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...


Tomas Svensson new director-general

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