Here is another one of those trucks. This photo shows a lot more of the pumping equipment and hoses at the rear of the truck. As you can see, the driver is a bit more protected in this vehicle than the previous one.
The photos in this slide show were taken in the mid-1990's by Steve Grande on his Amtrak travels throughout the nation. The size of the photos is purposely smaller as disk space was expensive and download speeds were slower at that time.