>> Cars are much safer, they have more sophisticated equipment now than they did 40 or so years ago. They are capable of driving safely at higher speeds. <<
there are more and more cars on the road, lots of inexperienced drivers who think they know it all
I drive 100 miles a day on motorways and I think 80 should not be a problem, stats suggest more than 50% do that anyway and plod do turn a blind eye. The problem is when plod are driving down the motorway people brake to 70, in heavy conditions this actually causes traffic to come to a grinding halt - very quickly. Allowing 80 then maybe this will be eased.
Jake has a point, at 50-60 I can get 28 mpg (diesel) at 70-80 it is around 23 mpg and if faster can drop to as low as 17mpg.
>> Cars are much safer, they have more sophisticated equipment now than they did 40 or so years ago. They are capable of driving safely at higher speeds. <<
That may be all well and good but in my opinion the mentality of a vast percentage of the drivers has also changed in that time. There are a lot more idiots on the road now who do not know that they are idiots...
Everyone ignores the 70mph limit anyway. You can overtake a police car at 80 and they don't care. I do alot of motorway miles and I see this every day.
What happens nudgescuffler is that if traffic is at a high enough density and someone slows unexpectedly the people behind brake quicker and so on which eventually causes a traffic jam.
Now you might say people shouldn't be that close but as the number of cars goes up that becomes difficult to avoid.
Of course if the average speed goes up you can actually get more cars on the road.
However I don't think this is the biggest issue. In my experience lorries overtaking each other when the motorways are busy is the biggest cause.
Perhaps restricting them to the inside lane only during peak hours might help significantly
i always saw the m25 as a giant concertina drive 5 miles, squish up, drive 5 miles squish up (and repeat) - all for no apparent reason other than perhaps a lorry moving into the midle lane.
about 20% of motorway drivers (almost invariably in German cars) exceed the speed limits and follow too close. They will continue to do so. They're just people who KNOW they are the best drivers and that laws were not intended to apply to talented and highly skilled people like them.