Open-Top Concrete Transporters

Article and pictures from online mag I get . 

Decades ago one concrete supplier in the city that I lived in at the time had open top trailers that you could use if you had small jobs of less than a yard and a vehicle with a 2" trailer ball. I used it once when I was extending some sidewalk in my back yard. I had a SUV which was more than adequate for towing. The mix was quite sloppy so I did get some small splashes on the back of the vehicle when I traveled. I'm not sure how popular that was and no other suppliers offered that option.

Redoing I 94 pavement here for about 12 mile stretch and doing it in sections over last 2 years . Shaffer trucking is running tandem trucks with open top pour trucks to supply mix to pavers . Unsure where batch mix plant is set up but they have a lot of trucks running when they are doing sections . 
  They do a 2 mile or so section , and move traffic to other lane with crossover lanes moving traffic from east bound to west bound lanes , keeping 3 lanes open separated with Jersey barriers along routes .
  Also laying concrete on top of permeable asphalt underlayment over substrate grading for moisture drainage .