By Ben Klayman DETROIT (Reuters) – General Motors Co will introduce in two years its first car that can communicate with other vehicles to help avoid accidents and ease traffic congestion, Chief Executive Mary Barra said on Sunday. In the same time frame, GM also will introduce more advanced technology allowing hands-free driving in some cases, she said. Auto companies, academics and government agencies globally are working to develop cameras, sensors, radar and other technologies that allow vehicles and surrounding infrastructure like stoplights to alert each other about nearby driving conditions. The industry is rolling out such features as adaptive cruise control, crash-imminent braking and semi-automated, hands-free driving like GMs Super Cruise feature to make roads safer.