1. Word choice affects the meaning of the article by showing the challenges of self driving cars, and what needs to be overcome to make it work.
2. An autonomous car is a vehicle that uses advancements in technology to aid a driver, but can be disabled and the car can be driven like any other. A self driving car however is a car that has no steering wheel, pedals, or controls for that matter. A self driving driving car is basicly not a car at all; more like a train really.
3. One of the existing technologies that does not depend on an infrastructure is lane changing technologies, as well as automatic cruise control. These systems work by using cameras and radar sensors.  
4. The V2V system is to communicate between cars using radio waves it can be useful to warn others of danger and tell others what cycle traffic signals are on.
5. The word choice in the sentence “The technologies to achieve self-driving vehicles actually feels very much within reach.” impacts the reader by saying that self driving cars or autonomous vehicles can become a reality in the near future. The affect on the reader is that is gives a positive outlook and hope towards self driving and autonomous vehicles.