Seventy is plenty. Eighty is hasty.
Just because they rhyme, doesn't mean I agree personally, but the only reason I'd drive over 80MpH in Amerika, is if I had a police escort. It wastes too much fuel, my emergency braking distance exceeds ten car lengths (190 feet), and at that speed or greater, you don't get a summons, you get arrested and impounded on most of the east coast. (Larger states with smaller population densities require greater limits.)
Then again, if I lived in Germany or Finland, or some such, I and everyone else would be trained to a much higher standard, which would only leave operation and maintenance costs as my only concerns.
Abercrombie wrote:
Everybody here knows that lane changes are very complex and quite dangerous.
Anyone who believes this to be true requires either significant amounts of remedial training, or eye or neck therapy/surgery. I don't know how someone could stand to live in a constant state of low-level anxiety by maintaining such a belief. Start by looking in any one of your mirrors every three seconds or less without changing lanes until you are always aware of what lane changes are possible - not just yours, by the way.
And talking down to us like Amerikan parents, IMO, is in bad taste.
If it's still 'very complex and quite dangerous', then at least you are more aware of what's going on, but you still need more education/training. Did you click on the next link at driversedguru to learn how to adjust your mirrors properly? It's got the right idea, but it still requires fine tuning. Hint: If you aren't in the middle of the car, should your view out the back be so perfectly centered? Oh, and that's an Amerikan website. Amerikan passenger side mirrors are slightly convex, but our driver side mirrors are not. Are yours?
When I became a taxi driver, I made no less than one lane change a minute, safely.
If necessary (usually due to bad directions from the client), I could go from the first/leftmost lane, to the sixth/rightmost lane, in just under five seconds, from the beginning of the physical maneuver, to the end of it. It would be necessary to violate the two-seconds-prior signaling protocol, which is why I don't ever like to do this, but I know when this can be done with an acceptable safety margin because my head and eyes constantly operate as if I might make a lane change at anytime while driving.
If you don't want to make that many lane changes, at least the ones you make will be safer with an excess of observational vigilance.