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.



Cost Benefit Analysis (CBA) workshop in Stockholm

An open seminar and workshop in Stockholm will be held on 25-26 April 2018. The workshop deals with the use of CBA as a basis for decision-making in the public sector. The workshop is organized by, among others, Professor Jan-Eric Nilsson, VTI.



Modal shift for an environmental lift?

Investigations in Sweden and other countries suggest a shift of goods transport from road to rail and waterborne transport to reach environmental and climate objectives. VTI is leading a new project to investigate how the modal shift can contribute and what...


Automation and digitalisation are making rail competitive

Road transport is developing rapidly and its productivity has increased sharply. Rail transport, however, has not developed at the same rate. Automation and digitalisation are essential if rail freight in Europe is to survive.


New research is creating a driverless logistics chain

The research project Born to Drive has come up with a system that allows new cars to move, without a driver, from the production line out to the parking area prior to being transported elsewhere. The vision is to automate the entire logistics chain from...


VTI testing automation in EU project

VTI is leading a series of tests in a major EU project on automated driving. The first driving tests were carried out n a test track in Slovenia in December. The project will focus in part on acceptance among different groups in society, in part on...


Freight transportation on road and rail analysed

Freight transport accounts for a large proportion of the emissions, noise and congestion produced by road traffic. Transporting freight in larger but fewer lorries could reduce the problem. At the same time it might entail freight being diverted from more...


Millions for research into maritime transport and the environment

Maritime transport is a major source of emissions of harmful air pollutants and carbon dioxide. In a new project, a research team from the Swedish National Road and Transport Research Institute (VTI) and the University of Gothenburg has received SEK 6.4...