Under what circumstances may a bus use a high occupancy vehicle lane?
Answer: A — At any time
A bus may use a high occupancy vehicle lane at any time because it is designed for vehicles carrying multiple occupants to promote carpooling and reduce traffic congestion. Option B is incorrect because buses can still use the lane even if they do not have any passengers at that moment. Option C is incorrect because the purpose of the lane is to incentivize carpooling during peak traffic hours, so buses are allowed to use it at all times. Option D is incorrect because buses do not need a special permit to use the high occupancy vehicle lane.