holy_calamity writes: University of Nebraska student Brevan Jorgenson swapped the rear-view mirror in his 2016 Honda Civic for a home-built device called a Neo, which can steer the vehicle and follow traffic on the highway. Jorgenson used hardware designs and open-source software released by Comma, a self-driving car startup that decided to give away its technology for free last year after receiving a letter asking questions about its functionality from the National Highway Traffic Safety Administration (NHTSA). Jorgenson is just one person in a new hacker community trying to upgrade their cars using Comma's technology. "A Neo is built from a OnePlus 3 smartphone equipped with Comma's now-free Openpilot software, a circuit board that connects the device to the car's electronics, and a 3-D-printed case," reports MIT Technology Review. The report notes that Neodriven, a startup based in Los Angeles, has recently started selling a pre-built Neo device that works with Comma's Openpilot software, but it costs $1,495.