Homer wrote:
The motorway limit was introduced in 1965 but the 30 limit was earlier.
History of the 70 limit can be found
here on the ABD site.
It was lowered (to 50?) during the fuel crisis in the 70's (with little actual fuel saving) and raised again in increments with the single carriageway limit sticking at 60 (was previously 70).
OK, the UK introduced a 70mph limit on its motorways in 1965 (end of the year), that is clear.
But then I am getting a bit confused. Is it 60 today? And since when? The year is important to me.