Highway 7 - Kitchener to Guelph

[danbrotherston]

I understand the concept of what you're saying about lowering "the design speed" (even 'the apparent' design speed) in order to actually enforce a lower speed limit.  But is there any data that actually backs it up as a good design principle?  Particularly for a high speed highway (I think its much more likely to be true when talking about city streets / intersections), I would imagine that causing people to drive at the 'design speed' of a highway means that below average drivers are more likely to get hurt in a high speed situation.

"Below average drivers"...that's a whole other can of worms.