Filed under Aerodynamic oddity due to the location and time and the number of Futurmama trucks shown.
http://rollerman1.tumblr.com/post/176060456069
That's Bleugene, Oregon, in the 1950s. You can see the big zero on Skinner's Butte and the sign for the Heilig theater that stretched across Willamette Street. It appears to be 10 of the late models and 4 or so of the older versions.
Then there is this:
Guns, Oil, & Dirt | From the movie Tango & Cash.
Back in the 1930s Breers added a 2nd windscreen to improve aerodynamics. Something similar here.
[IMG]
[/IMG]