Joined: Apr 2010
Posts: 6,341
Likes: 326
From: Mountain View, CA USA and Golden, CO USA
Bikes: 97 Litespeed, 50-39-30x13-26 10 cogs, Campagnolo Ultrashift, retroreflective rims on SON28/PowerTap hubs
That would be more dangerous than regular intersections unless you made bicycles stop while cars are moving, prohibited right turns at red lights, and only allowed left turns on green arrows.
It makes a cyclist going straight more vulnerable to a right or left hook due to increased separation between cyclists and where drivers are looking.