Seeing as how most people in Europe drive four cylinder cars (some "family cars" are actually quite small), and most of them are extremely fuel efficient diesels, they don't really need to try hard to save fuel. Sounds like an excuse to me.
As for reducing fuel consumption through speed limits, it isn't a new idea. Isn't that why they brought in the 55mph limit in the USA back during the fuel crisis of the 1970's?
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