![](https://www.mpa-hannover.de/wp-content/uploads/2016/01/Fotolia_25138617_L-1024x683.jpg)
Concrete surface layers for roads are produced with a regular joint grid. The joints must be watertight. Motorway joint profiles are used for this purpose. The department “Mechanical-technological tests” regularly carries out tests on motorway joint profiles in accordance with EN 14188-3.