Some automakers, as well as wireless carriers and chip makers, think that cellular systems will be better suited to handling vehicle-to-vehicle communications in the future. And, they say, cellular networks can handle connections to devices like smart traffic lights, tolls and other parts of the transportation infrastructure — so-called vehicle-to-everything or V2X communications. Most of these companies have their eyes on future 5G networks, which promise more capacity and broadband connections 10 times faster than is available today.