* That the evidence shows that the risk of having a crash is increased both for vehicles traveling slower than the average speed, and for those traveling above the average speed.
* That the risk of being injured increases exponentially with speeds much faster than the median speed.
* That the severity of a crash depends on the vehicle speed change at impact.
* That there is limited evidence that suggests that lower speed limits result in lower speeds on a system wide basis.
* That most crashes related to speed involve speed too fast for the conditions.
* That more research is needed to determine the effectiveness of traffic calming.
Median speed. These stats are based around median speed. Increase the speed limit to 100mph and nothing changes according to these stats. So let's do that!
But
* That the severity of a crash depends on the vehicle speed change at impact.
* That most crashes related to speed involve speed too fast for the conditions.
Really? These are quoted as reasons for speed limits?
Did you know most crashes that occur when it's raining out are due to slippery roads caused by rain?
Did you know most crashes that happen at night are caused by low visibility?
Did you know that if you don't get into a car, you're less likely to be involved in a car accident?
Right, so let's put limits on rain, the night, and ban all cars.
The real cause for the vast majority of accidents is the driver simply not being aware of both his or her surroundings and his or her's car's abilities. Like trying to take an exit in a top-heavy SUV at 60 and not realizing you might just roll over or that the light has turned red so you should probably stop before you get to the intersection. If you want to make a real impact on automobile-related accidents then there needs to be a major overhaul in driver's ed to include on-track emergency driving training and as well as requiring drivers to take refresher courses (which include on-track emergency driving training) every 5 to 10 years. You want a template? Look at Sweden, who have one of the lowest automobile accident rates in the world.