Mack's new 70-in. stand-up model allows driver to stand up next to driver's seat and walk into sleeper, which provides 35% more space, with Improved accommodation for driver's gear with up to 27 cu. ft. of space in the 70-in. sleeper model, with more work surfaces, wardrobes and shelving. All-LED interior lighting, including "ambient," "task" and "background" lights, the OEM said.