text: "For starters, they need a whole lot of sensors. Google's modified Toyota Prius uses position-estimating sensors on the left rear wheel, a rotating sensor on the roof, a video camera mounted near the rearview mirror, four automotive radar sensors, a GPS reviever, and and inertial motion sensor." That is a decent amount of tools that will need to be added to a car, not including what is needed to make the car drive. Also, because the cars aren't completely driverless, drivers will have to keep hold of the wheel. This is seen in paragraph 7 when it says, "...special touch sensors make sure the driver keeps hold of the wheel." This is inconvenient because even though the car is driving itself, drivers still have to be alert and be ready as if they are driving the car. This will caus drivers to get bored waiting to see if they will have to drive. In paragraph 8, Dr. Werner Huber states, "The psychological aspects of automation are really a challenge." This reveals that it is inconvenient to have the car driving while the driver is waiting in case she has to drive. Another inconvenience is that in some of the cars, they can only handle really slow speeds. Paragraph 7 states, "The car can handle driving functions at speeds up to 25 mph." This is inconvenient because most of the time cars drive at speeds faster than 25 miles per hour, and the feature of the driverless car will not be used very often. Because of all of the equipment required to make a driverless car run, and how little the feature will be used, driverless cars will be inconvenient and aren't worth being developed.