Rockie wrote:1. A lower speed gives a person more time to react to something that occurs in front of them.
True. If you are driving at 110km/h (speed limit on hwy 1 in most of Alberta) and have a 3 second gap from the car in front of you, you are following about 90m back. If you then speed up to 120 km/h and keep the same following distance, you now only have 2.75 seconds; so you are slightly less safe unless you increase your following distance by a few metres. Then again, you would be even safer if you were going 100, or 90, or 80...
Rockie wrote:
2. Large objects travelling in close proximity to each other at widely different speeds increases not only the potential for undesirable impacts, but makes it harder for a driver to spot a pending collision. If everybody is going the same speed it's much easier to notice and evaluate something out of place.
Right, except that speed limits do not force everyone to drive at the same speed, people tend to file into the traffic flow on their own accord. That traffic usually flows above the speed limit, and it is the people driving considerably slower than everyone else that create a hazard. Admittedly there are people who decide to go much faster than everyone else, and end up weaving through traffic to do so, but the problem there is usually inadequate risk assessment and awareness, not simply "exceeding the posted speed limit."
Rockie wrote:3. There are bad drivers, and there are good drivers.
4. We cannot identify who is a good driver and who is a bad one by looking at their cars.
We don't need to, that's what driving tests should do. Unfortunately the current crop of examiners are forced to focus primarily on following the letter of the law, and very little attention is given to good car control, traffic flow awareness, understanding how vehicles work, etc. Driving schools pick up on what is being tested and teach to the test - they're in it to make money after all. They stopped teaching a lot of basic items like controlling slides when the industry was privatized.
Rockie wrote:5. Even if we could identify the bad drivers, we cannot make them drive a different road than we do.
Sure you can, by simply not giving them a license. Make the driving test standard tougher and have it reflect the real world and you may be able to eliminate some of the people who should not be behind the wheel without additional training. Institute mandatory remedial training after an accident, and recurrent testing every 5-10 years to make sure people who've been driving for 40 years are up to date on current practices.
Rockie wrote:So given these truths it makes sense from a safety policy perspective to limit the speed to something reasonable that balances the need to get where your going in a timely fashion, but still permits the average driver the time to react to unpredictable events in front of them.
As was already mentioned, the article did not advocate eliminating speed limits but stated that it shouldn't be the sole focus of safe driving campaigns. A "reasonable" balance between safety and convenience with regards to speed varies from one situation to another, so it is not realistic to say that if a person stays under an arbitrary round number applied province wide they will be safe, and if they don't then they will crash.
"People who say it cannot be done should not interrupt those who are doing it." -George Bernard Shaw