How long may a driver remain in the passing lane while traveling at a high rate of speed?

Answer: B — Only as long as necessary to pass other vehicles

A driver may remain in the passing lane only as long as necessary to pass other vehicles, which emphasizes both safety and consideration for other road users. The passing lane is intended for overtaking slower vehicles, not for prolonged travel or cruising. Remaining in this lane for an unnecessary length of time can impede the flow of traffic and create hazardous situations, especially at high speeds, where quick maneuvers are crucial. This answer supports safe driving practices by highlighting the importance of swift action in passing situations to maintain the efficiency of roadway systems. It reinforces the principle that overtaking should be executed promptly and that the passing lane should be vacated immediately after the maneuver is completed.