There are few people who better understand the value of feeling at home on the road than those in the motorsports world.

At every level of racing, both in America and abroad, the track isn’t just a place to compete; it’s a place to live during race weeks. That’s why, when it came time to upgrade his family’s decades-old trailer earlier this decade, American open-wheel racing legend Michael Andretti knew something special was needed.

“We have to be there early in the morning,” Michael told Robb Report. “We’re there until late, till late at night. So, you know, for us to stay at the track, it makes it so much easier.”

Although the vehicle that Michael, his wife Jodi, and their kids had been using as their home base during the IndyCar season since 2003 had served its purpose ably, the family was looking for something that would make life at the track even more comfortable. The answer was to commission a one-of-a-kind, $3.5 million double-decker trailer named “The Zenith,” which, thanks to the help of interior designer Mallory Bouchard of Bouchard Design Collective, has more in common with a penthouse apartment than an RV.

Robb Report has seen its fair share of luxury travel trailers, but the Zenith is something else. Unsurprisingly, its seven-figure cost makes it one of the most expensive RVs of all time (the Volkner Performance S can technically cost more, but that’s because it comes with its own Bugatti hypercar).

Just as big as the price tag is the trailer itself. The triple-axle coach, which is based on a design by Texas’s Anderson Mobile Estates, stretches 53 feet long, stands two stories tall, weighs 80,000 pounds, and is towed between tracks by a twin-cab diesel truck.  The vehicle doesn’t just grow in height, though. It also features four slide-out sections, and when fully expanded, it offers up 1,200 square feet of interior space, plus a rooftop deck for relaxing or taking in a race.

“99.9% of people, when you say RV, you have something in mind, right?” Bouchard told Robb Report. “It’s a yacht on wheels. It’s a 53-foot semi.”

While Michael came up with the layout for the vehicle, Jodi worked with Bouchard to design the interior. She was focused on creating a space that looked elegant and modern—as seen by its sleek lines and adjustable accent lighting—but still featured some of the old-world touches loved by her husband. The first floor features a full-size designer kitchen with a hidden bar and an expansive entertainment and dining area with a custom 14-foot sectional and floating walnut table. There are also two full bathrooms and two sleeping areas, one of which is a bunk room that can fit six. This area, which Michael says his and Jodi’s kids never wanted to leave, also doubles as a home theater. Finally, there is a backlit mother-of-pearl waterfall sculpture and a romper room with a custom starlight ceiling.

The primary suite takes up the entire top floor of the coach. The highlight of the level is the main bedroom, which comes stocked with an elevated king-size bed, hidden shoe storage, and a mist fireplace. There is also a walk-in closet and a giant bathroom that features a custom-engineered shower. All the fabrication work found on both floors was handled by F/LIFE, a Canadian company that specializes in building luxury interiors for private jets and hotels.

“I really liked having the whole [primary] all the way upstairs, so it was completely private,” Michael said. “Times when we’d have people over in our other [trailer], the master was right there, so it wasn’t as private.”

The floor-spanning suite may look stylish, but its most impressive feature is that it can disappear at the touch of a button. Bouchard worked with Oregon’s All Dimensions Design on the trailer’s unique engineering needs, including making the entire top level fully collapsible. Once empty, the entire floor crunches down to just three feet, so that the vehicle can be towed to its next location. Once parked at its next destination, the floor expands to its full height, with each fixture back where it should be.

“This is the first project that I’ve ever worked on that didn’t have an architect. It had an engineer,” Bouchard said.

The Andrettis took delivery of the Zenith in July 2024, during the midst of the IndyCar season, but would only end up using the trailer for a few races. That fall, Michael sold Andretti Global, the motorsports team he had helmed since 2002, though he currently serves as a technical advisor to the new ownership group. The trailer was included as part of the deal.

The Andretti’s time with the trailer may have been shorter than expected, but the couple is proud of what they were able to create with Bouchard. They’re not the only ones impressed with how the vehicle turned out. The coach has been recognized with several industry plaudits, including at the International Interior Design Association’s BEST (Brilliantly Executed Spaces and Thinking) Awards, London Design Awards, and the NY Architectural Design Awards.

“To see it receive awards,” Jodi said. “We’re so grateful because we put so much time and love into it. It wasn’t something that was thrown together. It had a lot of thought every inch.”

Click here for more photos of the Zenith travel trailer.