Home Energy Trial of dye solar motorway barriers begins in the Netherlands Trial of dye solar motorway barriers begins in the Netherlands A one-year project to test the validity of solar harvesting roadside noise barriers has begun. Want to read more? You need to be a subscriber to read the full version of this article. Log in below for immediate access. Not a subscriber? Sign up today for full access to Tire Hub' exclusive, in-depth content. Prices start from: £800 /year