About Peak-hour lane and target-group lane: who may use it, and when does it close: which statements are correct? (multiple answers possible)
After the red cross the peak-hour lane ends and becomes a hard shoulder again; you may therefore not continue driving on this lane.
A peak-hour lane is an ordinary lane that is always open to traffic.
As long as there is no red cross, you may simply keep driving on the peak-hour lane, even if the arrow already points diagonally to the right.
Target-group lanes are special lanes for trucks and/or buses; as a car driver you may not drive on them, busy or not.
Explanation
Book p.74 - a peak-hour lane is an extra lane that is open only during busy periods; it is either the right-hand hard shoulder temporarily used as a lane, or a left-hand extra lane — trap: exception mistaken for the norm.