They had six wide windows per side with rolling curtains to protect passengers from sunlight when running on surface.
The rule, regulators explain, exists to protect passengers who may not appreciate a hard sell.
The roof of the Volvo held up enough that it might have protected passengers.
"Need air marshals to protect passengers from crew," says another.
The agency said seating these people elsewhere would help protect them and other passengers.
From its first appearance, special precautions had been taken on board America to protect both her ship's company and passengers.
Platforms 2 and 3 have a long canopy above them to protect passengers waiting for their train.
However, the economic interests of the company outweighed the need to protect passengers.
Its body design is intended to help protect passengers in the other car in a front collision.
More rigid curtains could be snapped in place to protect passengers from the elements outside.