Does the application of speed limit enforcement lead to fewer fatal road accidents?

Does driving more slowly reduce the number of road traffic accidents?
Does driving more slowly reduce the severity of road traffic accidents?
Does the application of speed limit enforcement lead to road users driving more slowly?
Does the application of speed limit enforcement lead to road users driving more safely?
Does the application of speed limit enforcement lead to fewer fatal road accidents?
Are some kinds of speed limit enforcement better than other kinds?
Should there be lower speed limits or higher speed limits?
Who benefits from lower speed limits?
Who benefits from higher speed limits?
How does local government determine which parts of roads should be allocated with which speed limit?
Is this policy applied consistently or inconsistently?
Are there other reasons why it is better to drive slower?
Is it ever a good thing to drive faster rather than slower?
Why does road-use legislation tend to want us to drive slower?
Does speed really kill?
Isn't there evidence to the contrary in countries where there are less speed limits or no speed limits on certain roads?
Are there other benefits available from having cars move more slowly (eg. less noise polution) ?
Is UK speed limit enforcement designed to slow down traffic or to create revenue?
If I drive within the speed limit, and other drivers keep overtaking me as a result, am I making the roads safer or more dangerous?
Does transferring attention onto the speedometer and off the road put pedestrians and other road-users' lives at greater risk?
Should we driver slower or faster?
Is it really "thirty for a reason"?
What is the reason?