The Autobahn has a recommended speed of 130 km/h. OP was talking about Landstraßen having a speed limit of 100 km/h. The two are very different kinds of roads.

The Autobahn has a recommended speed of 130 km/h. OP was talking about Landstraßen having a speed limit of 100 km/h. The two are very different kinds of roads. The Autobahn does have concrete dividers and hard shoulders for example. It also has a much more predictable design compared to a Landstraße.