朝夕共に、両方向の時間限定通行が可能ですが、観光用とは考えないほうがよいと思われます。
NPSより：
Highway 140 Information
Caltrans has changed the westbound caravan waiting location to Highway 140 opposite Cedar Lodge. The second bridge has been completed. Vehicle size is limited to 28 feet. No new schedule has been issued. Below is the current access schedule.
Hours of operation in the morning:
*Westbound traffic will leave at 5:30 a.m.
*Eastbound traffic will leave at 6:00 a.m.
Vehicles need to arrive and be in line before the scheduled leaving time or they will not be allowed to join the caravan.
Hours of operation in the evening:
*Westbound traffic will leave at 6:00 p.m.
*Eastbound traffic will leave at 6:30 p.m.
*Westbound traffic will leave at 7:00 p.m.
Vehicles need to arrive and be in line before the scheduled leaving time or they will not be allowed to join the caravan.