Rhythm Thief wrote:
I don't stare at the speedo all the time; I know how fast I'm going because I was doing 30 the last time I looked and the engine note hasn't changed since. I can get up to any speed now and sit at it without looking at the dash at all, because I know the vehicles I drive.
Try doing that on an auto that has a torque-convertor! On mine, I can set the engine speed at 3000 rpm at standstill and keep that engine speed as the car accelerates smoothly all the way to 70 mph. Just like a manual car, at a "constant speed" minor changes in gradient, camber, windspeed, and even the road surface affect the speed I'm doing. However, that change of speed happens without a change in engine note.
Quote:
BUT, the fact remains that if the speed limits are posted and you don't stick to them, you haven't been alert enough to spot the limit signs. Which is surely a bad thing: after all, what else might you have missed?
If only that were true. Many speed limit signs are overgrown with vegetation or hidden behind other signs so that you can't see them until you're almost on top of them.
Quote:
Yes I know cameras are indiscriminatory and that 32 mph is not as bad an offence as tailgating or drunk driving or pulling out in front of people or passing too close to bikes or....well, you know. But driving at the posted limit is not hard, even if it doesn't always make sense.
Comments please?
I used to choose the speed to travel by time rather than by miles per hour. If I had enough time to spot and avoid hazards, it was safe. Of course, I tempered this with some deference to speed limits. I had a scan pattern where I'd scan ahead from near to as far as I could to identify possible hazards as soon as possible and then rescan, paying particular attention to the hazards identified until each could be discounted or developed into a "problem". My normal "anticipation region" was at least ten seconds ahead and I reduced speed to keep that true where necessary. On no account would I drive with less than a four-second region (except for some very rare geographical factors - and I felt uneasy until I had my safety zone back!)
Now, the draconian and pedantic enforcement of speed limits has changed my priority from safety to preservation of my licence. I now do not exceed speed limits knowingly. However, to do that I need to know two things at all times: the speed limit, and my speed. Ensuring that I have that knowledge takes a huge amount of attention away from my scan. Speed limit signs have a habit of becoming hidden by vegetation and by other road signs. So, to ensure that I always know the speed limit, I need to scan the road sides above the level of my safety scan. To always know my speed (particularly in an auto where you can't use engine speed as a guide) requires constant checks of the speedo.
So, to ensure that I always obey the speed limit, I have to fit three scans into the time I used to fit one. This means that, at the speeds I used to travel, my scan-ahead zone would reduce to about four seconds. However, I don't travel quite so quickly now, so that has only reduced to about five seconds. Yes - rigid obedience of the speed limit has significantly reduced my observation and anticipation - and that can't be good for road safety.