Gene, I have never seen this and to be honest there is no need for it, it will happen when a truck starts passing a slower truck uphill, then on the level the slower truck will get back to 56 probably whilst part of the other truck is alongside, all the inside driver has to do is ease off a little for only a few seconds and let the truck in lane 2 pass safely OR read his highway code which will tell him what not to do when being overtaken.
After rereading my reply I found it a bit sharp. It was most definitely not intending to wind you or anybody else up. Like most guys when young, I thought I was invincible and looking back I took some stupid risks but back then when 1.3 cortinas were a babe magnet (that is yet another thread) if you went into a corner to fast you just spun out, the roads are a lot different now and the cars much more capable with the average speeds higher and the safety structure much stronger which gives people a false sense of security.
I admit im a bit touchy with road safety. Ive been driving trucks fulltime since 1988 and have seen many accidents where arms and legs are at unusual angles and not always at the joints. I witnessed a fatal accident caused by an impatient male driver who tried an overtake whilst going round a lefthand sweeping bend, after the tyre smoke cleared an innocent lady driver (in a Land Rover Defender) was killed when she hit the steering wheel/column with her chest after hitting the car head on. You cant give CPR when the chest is crushed, I know, I tried. I found this experience life changing (on many levels) saying what happened at court is stressful, explaining how you tried to save the lady is upsetting, and after the court, being thanked by her parents for trying your best is extremely humbling and upsetting and I would not wish the experience on anyone. When driving 10 seconds can change your life in ways you cant imagine or have not thought about.
The answer to almost all these "accidents" is slow down a bit and drop back from the vehicle in front, you will still get there, you wont be late.
If I could give 1 piece of advice it would be have a go at Advanced Driving, there are local groups all over Scotland with either RoSPA or the IAM, the training is free, and is based on the same system as the Traffic Police use, infact you will be tested by a serving Traffic Police examiner, you can do it in any class of vehicle as the training is based on how you drive not on what you drive, its not easy but is a real eye opener.
Thats my rant (therapy session) over.
On a positive note and to put this back on thread, Ive noticed over the last few months that people are slowing down, cars and even white van man are starting to sit at 50 on A class roads, so although the supermarkets are charging less for their fuel, its still a large bill at the end of the month, there are positive sides even to high fuel prices.
Drew.