Verse 1 David fires up Ruby, that Peterbilt gives a low diesel growl, Morning fog on the hood, sun risin’ like a vow. Interstate 40’s callin’ like a long steel hymn, And that LS load don’t move till he’s behind the wheel again. Every small‑town exit, every stretch of that line, He’s chasin’ down a livin’ with a backbone made of spine. Chorus They keep America movin’ one mile at a time, Down 40 and 75 on that dedicated line. Ruby gets attention, every dollar at a time, But it’s David & Marcia with the heart and the grind. Every town through the windshield feels like a postcard sign— Yeah, they’re livin’ the dream one mile at a time. Verse 2 Marcia takes the wheel when the daylight bleeds, Night‑shift queen with a fire in her speed. She turns on your YouTube, lets your songs cut the dark, Says that gravel in your songs keeps a spark in her heart. Truck stop neon flickers like a ghost on the chrome, But Ruby keeps rollin’ like she’s draggin’ heaven home. Pre‑Chorus And back home folks are prayin’ every time they roll, “Lord, keep ’em safe out there on that long stretch of road.” Chorus They keep America movin’ one mile at a time, Down 40 and 75 on that dedicated line. Ruby gets attention, every dollar at a time, But it’s David & Marcia with the heart and the grind. Every town through the windshield feels like a postcard sign— Yeah, they’re livin’ the dream one mile at a time. Bridge From Knoxville’s glow to the Memphis night, They’re the quiet kind of heroes keepin’ this country upright. Some folks chase fortune, some chase fame— But these two chase freedom with Ruby’s name. Final Chorus They keep America movin’ one mile at a time, Down 40 and 75 on that long‑haul line. Ruby turns heads, every dollar at a time, But it’s love in that cab that makes the whole thing shine. Every town through the windshield feels like a story in rhyme— Yeah, they’re livin’ the dream one mile at a time.