[ieee2]

Yes, the less sharp angle of the described bike-lane would imply that biker can get into the sidewalk in high speed without issue and harm a pedestrian easier.

[drunner]

Yeah, that's why when pedestrians have to cross where cars are that there is always a stop sign to make sure their high speed won't harm a pedestrian /sarcasm.

[bccdee]

…we do put stop lights at pedestrian crossings on high-speed streets. They look like this: http://www.pedbikesafe.org/PEDSAFE/cm_images/PedHyb1.png