Maths challege for Object

Yeah, you tell 'im Fenella... There aren't that many bits of de-restricted autobahn left are there? I was out there 6-7 years ago and we only found one short stretch...

I think about a quarter of the network is still unrestricted.

EDIT: Wikipedia (same link as above) suggests as much:

About one quarter of the total length of the German autobahn network has no speed limit, about one quarter has a permanent limit, and the remaining parts have a temporary limit for a number of reasons.