My thoughts echo those of Clairel and ChrisBurns at #17 and #19 above. Also, there'd better be some room left on the proverbial block for me because I think it's accurate to suggest that virtually all of us forum users who drive on motorways will do so at speeds over 70mph at least some of the time. Also, surely vehicle speed isn't the sole factor in road accidents. Like some others I think that sloppy driving habits (not using indicators, not maintaining adequate separation distances, rapid lane hopping, hogging second & third lanes, texting, etc, etc) are probably greater factors.
Some years ago I had a longish holiday in Germany and the Czech Republic which included a fair bit of driving on autobahns, the German motorways. Unless there has been a recent change, these have no speed limit except for stretches which have notable gradients, considerable curves and/or (perhaps) become very congested. My impression was that driving discipline on the autobahns was notably better than on UK motorways. With some cars being driven at speeds of around 120mph, there was probably a good incentive for people doing lesser speeds to be vigilant and also allow ample space and time when changing lanes. For the car I was driving an average speed of 80-85mph felt comfortable for me, but going over 90mph just felt too fast. However, I don't know the statistics for accident frequency and outcomes, etc., on autobahns, and to what extent speed is a factor. Therefore, in relation to the original topic about the wisdom or otherwise of raising the UK maximum speed limit, considering the autobahns
might not be of much help, especially if driving discipline on them is better. Can others with more recent and better experience of autobahns comment on the standard of driving on them?
Also, as I've mentioned before on this forum, there are times on motorways when adverse conditions (congestion, fog, snow, heavy rain, etc) dictate that drivers should reduce their speed to match. However, some *drivers seem oblivious to such conditions and will persist in driving at high speeds, close together and without lights on to make their vehicles and their relative speeds easier to see and determine. In adverse conditions I'm happy to drive at reduced speed or even get off a motorway - with my overall aim of reaching my destination in one piece, even if later than expected. (At * I was going to write 'cretinous', but decided this would be derogatory and unfair to cretins!)
One element which probably contributes to sloppy driving on UK motorways is that the UK driving test doesn't include motorways. It's bizarre - considering that someone who has just passed their test can legally drive on a motorway without any related instruction and assessment of their ability to drive safely on them. Also, the vast majority of UK drivers use motorways regularly or at intervals. Surely there's a strong case for motorway driving to be included in the UK driving test scheme, probably as a subsequent stage for tuition & test after passing the main test.
Also, there's surely also a good argument for drivers to re-sit their test at say 10 yearly intervals. On this point, how many of us who are drivers, myself included, (except members of the Institute of Advanced Motorists [IAM ] and similar organisations) could really be certain of passing a driving test again if we were to take one at short notice?!!!!