Here are three videos from several years ago. One is from the 2005 Tweel(TM) introduction, right after the Detroit Autoshow. The second is from one of my favorite activities - bringing real-world engineering into the classroom. The third is a fun part I played in developing a robotic Tweel(TM) for NASA

Here are two short segments from NPT field testing in Manhattan, NYC. The application is last-mile delivery, for which flats and tire maintenance are a major problem.