![[Sonnenstrahlen durch Wolken]](https://www.aldenhoven-testing-center.de/images/blog/2021/heiter-wolkig-big.jpg)
![[Sonnenstrahlen durch Wolken]](https://www.aldenhoven-testing-center.de/images/blog/2021/heiter-wolkig.jpg)
Cloudy and clear skies
If you test vehicles, you certainly know that weather can have an impact on test data: For Euro NCAP (European New Car Assessment Programme) test scenarios, for example, dry asphalt with a coefficient of static friction of 0.9 is required and proof must be provided that the test meets these specifications.