It is July 23rd, 1960, and Sheldon Wolf is delivering a load of new cars in route to New Mexico...as the classic Mack bulldog hood ornament leads the way. The front of the rack that carries a car over the semi tractor is lit up by the headlights. This is a dangerous curve between Denver and Antonito, which is well known as to the animals who travel this route...Many of the truck drivers refer to that curve as "Carnage Curve". As you can see on the speedometer, 40 mph is as fast as anyone with good common sense would take that curve. Where Sheldon Wolf is shown driving in the drawing, if Sheldon was to stop the truck, and you were to open the passenger's door and step out, you would step out over a sheer drop of several hundred feet straight down.
In this pic is that same curve during daylight hours...As can be seen, there is no room for mistakes doing anything stupid.