At the University of Iowa's National Advanced Driving Simulator (NADS) research center, more than 40 faculty, staff, and students use a 93-ton moon-lander-looking machine and a variety of vehicle cabs to study the way people drive. This test rig—called NADS-1—rides on seven belts (six on the x-axis, one on the y). All in, this costs about $80 million, but it allows researchers to perfect today's automated driving tech in a safe, controllable way.