The original vista dome on the Burlington did not have a depressed section under the dome. The car was converted from an existing coach. The area under the dome had aisles adjacent to the windows (the area under the dome seats) with normal headroom. The area under the aisle in the dome had...
In 1967 The Sunset Limited was combined with the Golden State in El Paso. The Sunset arrived at 1:35 and the Golden State arrived at 2:35. The combined train left at 3:00.
The problem of depending on skylight style windows in coaches replacing a lounge is that many passengers prefer to close the curtains, especially during the evening hours. This makes it impossible to see what is outside.