Since Amazon made one-day shipping the default in 2019, however, DSP drivers have voiced some big concerns.

Everybody I knew was buckling their seatbelt behind their backs because the time it took just to buckle your seatbelt, unbuckle your seatbelt every time was enough time to get you behind schedule," said Adrienne Williams, who drove for an Amazon DSP from November 2019 to July 2020.

A 2019 ProPublica report found that Amazon's contract drivers were involved in more than 60 serious crashes since 2015, at least 10 of which were fatal.

In court, Amazon has repeatedly said it's not responsible for the actions of its contractors.

"I just don't feel like I should be watched eight to 10 hours out of the day," said Shaleen Williams, a DSP driver in Lansing, Michigan.

Watch the video to hear from more drivers about the realities of the job, how the model works, and why Amazon outsources delivery to DSPs