Okay, it was a vehicle. A flat one with wide wheels designed for rough terrain, with benches instead of seats and the steering apparatus in front. It wasn’t for the surface, unless the humans were wearing protective suits, or unless whoever was transporting the humans didn’t give a crap whether they got hit by ground debris. So yeah, probably the latter. It was for the surface and the workers had used it down here where they were less likely to get injured. (And it being here wasn’t the weird thing; this had been a work site, there could be all kinds of equipment abandoned down here.)