Meet REV-1, a food delivery robot developed by Ann Arbor-based start-up, Refraction. Founded by UMich professors and roboticists Matthew Johnson-Roberson and Ram Vasudevan, the company is solving the last mile challenge by making a low-cost, lightweight autonomous delivery robots that can operate in both the bike lane and on the roadway. Continuing our series of interviews at CES, we spoke to Matthew Johnson-Roberson to learn more about its food delivery robot.