text: Now other than dangerous, they are also very impractical. Early forms of self driving cars such as "Traffic Jam Assistant" are examples of how impractical they are. "The car can handle driving functions at speeds up to 25 mph," this is a very slow speed and seems almost useless. Along with only going 25 mph self driving cars also require you to keep your hands on the wheel at all times. "Why would anyone want a driverless car that still needs a driver?".