Two lanes road. Right side: ramp to Hardbrücke, left side: direction Altstetten.
On bike, to go to Altstetten I need to ride on the right side of the left lane, hence in the middle of the road. Very dangerous to be overtaken from the left AND from the right side by cars going to Hardbrücke.
Furthermore, many cars coming from Altstetten do U-turns by crossing the bus lanes to go to Hardbrücke, irrespective of bikers.