I've recently had reason to think about my own driving.
Before I had learned to drive - ie long ago - I first hear the expression "accelerating out of danger" from the father of a young lady of my acquaintance, sounding off about why he just had to have the most pwerful model of Zodiac as his company car. It's always sounded wrong to me.
Jump forward a bit, and when the M1 was extended into Leeds, the last few miles called the Leeds South Eastern Urban Motorway were subject to a 50mph limit because of the lower design standards imposed by running it through the buit-up area. That limit was robustly enforced by patrols and I've worked many hours overtime, prosecuting the cases at Leeds Magistrates' Court. (No cameras or fixed penalties in those days.)
The road is now the M621. Enforcement is long gone, so there's a dangerous mix of those who comply and those who do not, on a road designed for 50 mph max.
Jump forward to 2018, and Highways England have installed average speed cameras to enforce a temporary 30mph limit through roadworks.
Recently, I had to make a welfare journey and the M62 was reported blocked by a vehicle fire, so I used the M621, needing to exit at J7 or I'd have been back round to the M62 and the fire.
Trundling along at an indicated 30 mph in the first lane, I reached J5 where the entry slip forms a new first lane. A chap doing the same speed as me came down the entry slip so we were side-by-side. I would have slowed and pulled in behind him to prepare for my own exit, but there was a very large HGV right up behind him. I checked my mirrors and a similar HGV was by then right behind me, so close that the driver cannot have been able to see my brake lights. Had I even eased off, I'm pretty sure I'd have been shunted. For the first and hopefully last time in my life I accelerated out of danger, just sufficiently to clear the car to my left safely, before slowing back to an indicated 30mph. No official correspondence so I presume that I didn't exceed the average which triggers it, possibly because in my car the indicated 30mph = 27mph or whatever.
On another journey providing Dad's chauffeur service in the opposite direction, keeping a careful eye on the speedo in my son's car, I missed the end of the temporary 30mph and only realised I had done so when everything roared past. It's surprisingly difficult to adhere to a 30mph limit on a motorway without a lot of reference to the speedo.