(THE GUARDIAN) — Jeff Baxter’s sunflower-yellow Kenworth truck shines as bright and almost as big as the sun. Four men clean the glistening cab in the hangar-like truck wash at Iowa 80, the world’s largest truck stop.

Baxter has made a pitstop at Iowa 80 before picking up a 116ft-long wind turbine blade that he’s driving down to Texas, 900 miles away.

Baxter, 48, is one of the 1.8 million Americans, mainly men, who drive heavy trucks for a living, the single most common job in many US states. Driving is one of the biggest occupations in the world. Another 1.7 million people drive taxis, buses and delivery vehicles in the US alone. But for how long? Having “disrupted” industries including manufacturing, music, journalism and retail, Silicon Valley has its eyes on trucking.

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