Four unused cars can be found in the game's files. They consist of a Ford Expedition, a Toyota Celica, a Hummer H1, and a Nissan 350Z. The Ford, Celica, and Z350 are fully functional, but the Hummer's materials file doesn't point correctly at its model and textures, and only draws the alpha channel on most of the vehicle.

The maximum speed the trucks cap off at when driving in reverse amounts to 12.3 undecillion miles per hour (for perspective, this number is 1.8341329e+28 times the speed of light), because no upper limit was implemented by the developers to cap off the speed for driving in reverse at a more realistic limit. After this speed is reached, the speedometer displays a value of -001.$ and causes you to win the race despite having driven in reverse practically infinitely. This is because as a truck travels faster in reverse, it will gradually travel along more of the surface area of the race track until it covers every pixel on the map simultaneously including all of the race track's checkpoints, meaning that the truck won the race because it was everywhere at once.

On March 22, 2025, a Steam page for Big Rigs: Over the Road Racing was discovered despite no such re-release being announced prior. This led many to suspect the listing was fake, as the publisher was a Hong Kong-based company called Margarite Entertainment with no prior releases, the header had been taken from SteamGridDB, and the client icon appeared to be AI-generated. In response to these concerns, Margarite Entertainment made a community post on Steam claiming that they had acquired the rights to the game as well as other titles, and that the SteamGridDB was simply altered box art. The re-release was officially revealed with a trailer on April Fool's Day of that year, with a release set for a week later on April 8th. The original YouTube description for the trailer contained a Google Drive download link to a copy of the trailer that also accidentally included a folder containing sensitive business documents and bank information relating to Margarite Entertainment, but was removed from the upload the following day.