Custom car maker Austin Coulson always knew the one road sure to take him to record-breaking history.

Turned out in his case that the road was quite literal: Coulson enters the Guinness World Records 2014 edition as the owner of the smallest roadworthy car, meaning he can legally take his mini-machine out on the road.

"I've always wanted to have a Guinness World Records [title] for something and automotive was always my favorite," said Coulson (pictured above with fiance Lisa Stoll). "So I went home and looked up this current world record and thought, 'I could do that.'"

Coulson's car measures 25 inches (63.5 cm) high; 2 feet, 1.75 inches (65.41 cm) wide; and 4 feet, 1.75 inches (126.47 cm) long, and can be spotted by its Texas vanity license plates reading "IM BIG."

The car's paint work is themed after the U.S. P-51 Mustang military aircraft and the sides are inscribed with the tail numbers of a ship that Coulson's grandfather served on during World War II. It is often driven during local veterans' military parades.

To qualify as a roadworthy vehicle, Coulson needed to get the car registered and inspected and had to install a number of required safety features. These included federally approved safety glass for the windshield, functioning windshield wipers and department of transportiation-approved signal lights, a seat belt, and working horn.

"When I told my family I was going to try and get the world record for the smallest roadworthy car, they were a little skeptical at first," Coulson said. "All along, the whole process, they kept questioning it. They knew I could build the car, they just didn't think I could get it legal."

To find out how many miles to the gallon Coulson gets, how he constructed the vehicle, and to watch him take it for a spin, check out our exclusive "Meet the Record Breakers" video.

The Guinness World Records 2014 book edition is on sale now at all major retailers. Find a full list here. Don't forget to also download three exclusive iBooks available now in the U.S. iTunes store, as well as the UK and Ireland iTunes store: "Awesome Animals," (free download), "Colossal Constructions," and "Incredible People."