Maybe because this way leaves room for a wheeling lane?
An idea I'd like to see tested:
- 1-way traffic
- Parking on both sides of the road
- 1-way bike lane runs right down the middle of the road (ideally painted green)
- Median islands every block (or every other block) that force vehicles to turn off but let cyclists free flow straight through
- 'No Passing Cyclists' signs (cars wouldn't be slowed for more than a block)
Market these as Cycling Roads that accommodate local vehicle traffic only.
I think we need to work towards more peaceful coexistence between cars and bikes on the roadway with more physical protection at intersections (less busy intersections at that); our current approach is the exact opposite where we make everything safer until the most dangerous part (intersections + driveways/alley entrances)