Photos: Peterbilt's Model 579 UltraLoft
Improved aerodynamics mean owners can get 1% better fuel economy than a Model 579 with a discrete sleeper. Photo: Peterbilt
The Model 579 UltraLoft starts in the cab, where there's plenty of room to move from the driver's seat into the sleeper, as well as additional storage above the doors. Photo: Peterbilt
To make getting into the upper bunk a breeze, there's a ladder that folds down from the top bunk, rated for up to 400 pounds, plus grab handles on the edges of the cabinets. Photo: Deborah Lockridge
The single-bunk model offers plenty of airy space for drivers who spend lots of time on the road. Photo: Deborah Lockridge
Below the room fridge there's a drawer perfect for storing extra soft drinks ready to re-stock. Photo: Deborah Lockridge
The cab and hood of the Peterbilt Model 579 UltraLoft are the same as other Peterbilt 579 models. A new sun visor acts much like an air foil for improved aerodynamics, and the sculpted roof maintains the distinctive 579 look. Photo: Peterbilt
Peterbilt Chief Engineer Scott Newhouse talks about how engineers had drivers test out mockups and refined the design based on their feedback. Photo: Deborah Lockridge
Increased storage is a key feature of the Peterbilt Model 579 UltraLoft. Photo: Deborah Lockridge
A double-bunk Peterbilt Model 579 UltraLoft on display at the press unveiling. Photo: Deborah Lockridge
There's room for a good-sized television at the foot of the bottom bunk. Photo: Peterbilt
In the double bunk configuration, there's room to sit on the lower bunk without bumping your head. Photo: Peterbilt
Drivers complained that the small microwaves in most sleepers were bad about burning food, so the UltraLoft accommodates a 1.1 cubic foot model. Photo: Deborah Lockridge
Controls for the new HVAC system and three power ports -- 12, 110, and USB -- are within easy reach from the bunk. Photo: Deborah Lockridge