Unless they're planned in from the beginning, they steal space from the other lanes, making them narrower. And it's also common that they'll start and stop in strange places, leving riders stranded in mid-traffic.
A badly planned bike lane is often worse than no bike lane at all.
Don't understand the question. There is no law saying there has to be bike lanes or bike paths.
No, but it is frowned upon. Some cities have bike lanes to stop people from riding on sidewalks.
Most cities have some bike lanes, somewhere.
High Occupancy Vehicle (HOV) lanes.
If the Engine is 50cc or larger it is Illegal to ride in a bike lane
Since the bike lane is assigned to the bicyclist, they always have the right of way in their lane. If you need to move to the right to make a right turn, you must yield to any bikes in the bike lane.
Use the Acro bike to get across when there is a gap in the lane do a sideways bike jump to get across.
They don't care, car drivers are largely ignorant about bikes.
I'm assuming you mean "bike lane" ....And the answer is no, bike lanes are mainly intended for unmotorized vehicles. Scooters and mopeds with small engines might be OK, but a dirt bike is way too powerful.
Usually you don't really "need" a bike lane, but if it's a properly planned one it can make riding easier. It lets motorists know that you have the right to be there, and hopefully pedestrians will give you a clear path. Trouble is, many bike lanes are added as an afterthough, so they can be poorly planned and actually be more trouble than help.
Yes. And bikes will be double parking in those lanes as well impeding the cars movement.
A lot of times, merging into a turn lane may require you to cross over a bike line, or the turn lane may be jointly a turn lane and bike lane.