| Country: | DEU |
| Type: | A |
| Route: | 31 |
| Map Custom: | yes |
| Length Km: | 240 |
| Direction A: | North |
| Terminus A: | North Sea near Emden |
| Direction B: | South |
| Terminus B: | Ruhr area |
| States: | |
| Previous Type: | A |
| Previous Route: | 30 |
| Next Type: | A |
| Next Route: | 33 |
is a German Autobahn that connects the coast of the North Sea near Emden to the Ruhr area. It is also known as Emsland-Autobahn or East Frisian Skewer.
It was completed in December 2004. Construction was in part made possible by a unique method of financing: individuals, companies, towns, counties and the Netherlands donated money to accelerate the project.
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