[quote="GEddie, post:6, topic:324552"]
As almost everything else, it depends upon the context.
If everybody else is over the limit, it would not be a sin just keeping up with them, IMASP.
Blowing through a school zone at 60 MPH or Kph would be.
There are two issues; submission to the civil power, and respect for human life.
The CCC reference is here...
2290 The virtue of temperance disposes us to avoid every kind of excess: the abuse of food, alcohol, tobacco, or medicine. Those incur grave guilt who, by drunkenness or a love of speed, endanger their own and others' safety on the road, at sea, or in the air.
It pairs speeding with driving drunk in the degree of culpability.