Here's a drawing I made a while ago envisioning a collector / express system along Highway 401 in the London Area. This is a long-term vision.
It's pretty rough (made in paint) and is not drawn to scale in any way, shape or form.
In addition, the interchanges are spaced much further apart and the overpassing roads are at different angles in RL.
Click here for full size if it doesn't display correctly.
Anyways, I hope you enjoy it, even if you're not familiar with the London Area. Just something to think about.