> And building 20 lane highways doesn't take billions of dollars? Building highways is very expensive, but much much less expensive than new rail. The most cos

> And building 20 lane highways doesn't take billions of dollars? Building highways is very expensive, but much much less expensive than new rail. The most cost effective and environmentally sound thing to do is to make the most possible use out of existing infrastructure. As safe and predictable drivers (no fast stops and starts, swerving, or accidents), Waymo smooths traffic for everyone.