This week's Question: Google has been testing its autonomous cars on public roads. The search giant's fleet of robotic Toyota Priuses has now logged more than 190,000 miles, driving in city traffic, busy highways, and mountainous roads, with only occasional human intervention. The Google team asserts that the smarter vehicles could help make transportation safer and more efficient. For example, cars could drive closer to each other, making better use of the empty space on roads, and also form speedy convoys on freeways. The vehicles would also react faster than humans to avoid accidents. Do you agree? Will autonomous vehicles increase efficiency and make us safer? RESULTS