It may not exactly be "rolling stock" but it runs on rails so I'm rolling it out of the factory.
The PCC (President's Conference Committee) style of street car was the type used all over North America during the 1940's, 50's and 60's, This was an attempt to design a standard, modern street car that would keep cities from paving over their street car rails. And we all know how that turned out. I remember travelling as a kid to Toronto where these types of street cars were kept running long past their design lifetimes. I liked their shape then and I still do.