If you have a T junction, either you're going to have the car path going through the bike path, or you'll need a bridge or tunnel. And the best places for cycl

If you have a T junction, either you're going to have the car path going through the bike path, or you'll need a bridge or tunnel. And the best places for cycle commuting have high density - meaning more T junctions per mile. 'Truly separated' bike infrastructure isn't easy.