Driftåtgärder mot PM10 i Stockholm: utvärdering av vintersäsongen 2015–2016

Download
Christer Johansson
Michael Norman
Sanna Silvergren

Since 2011, Stockholm has made special efforts to reduce PM10 levels in the city. The efforts mainly include dust binding with CMA (calcium magnesium acetate) and vacuum suction with a powerful dry vacuum suction machine. This report summarizes effects on particulate matter and road dust storage, as the actions taken by Stockholm City during the 2015–2016 season and discusses how measures can be further improved. The limit value for the environmental quality standard was not exceeded for the 2015–2016 season for the third consecutive year, but the number of days with PM10 levels over the environmental quality standard was higher than in the previous season, which had a record low number of exceedances. The evaluation of daytime dust binding was complicated by the fact that the CMA was also used on the reference street, which caused to much uncertainties to provide quantitative analysis of its effect this season. Block-wise dust binding and vacuuming could not be evaluated due to dust contamination from a construction site. The dust load on the streets varies from a few g/m2 to about 250 g/m2 depending on the street and season and is highest during the winter (Dec–Jan). A trend towards lower dust loads is broken this season on several streets, which may be due to the damper streets in spring. Analyses made on the connection between dust load, PM10 and impacting factors, as well as a condition-based calculation method suggests that dust binding in spring is important for keeping the levels down, while dust binding in autumn and winter is more often “unnecessary” (the levels would probably not have exceeded the limit value also without dust binding).

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)...