Various sites have posted images from the Mid-America Trucking Show 2014 where Western Star Trucks is featuring the Vehicle Mode of Transformers: Age Of Extinction Optimus Prime.
Courtesy of Overdrive, we now have our first look at the interior of the vehicle as well as a very close detailed look of the exterior. If you visit their stall at MATS 2014 you can even grab an Optimus Prime themed cap from Western Star.
The vehicle now has a new model number replacing the previous of WS4900: Western Star 5700-OP
Checkout the images attached with this news post.