The figures are compared with February this year as well as last year. But the municipality of Umeå cannot determine what the reduction is due to - one theory is that the corona virus means that more Umeå residents work from home and do not have to pass the center. But there are other theories as well.

- It may depend on the weather. The traffic changes over the year and it may be that more bicycles and runs because of the bare ground, says traffic planning manager Marie Frostvinge.

She believes that traffic may be affected by the corona virus more in the future.

- If there are more guidelines that we should work from home, it should be more visible, she says.

Low nitrogen dioxide content

On a regular day, about 20,000 vehicles pass through the Western Esplanade. But the decrease has not been noticed on air quality.

- We have looked at measured values ​​of nitrogen dioxide and we are very low this year. But we do not associate it as much with the traffic as with the weather. If it blows a lot, the levels will be lower, says environmental inspector Joakim Linder.