If you look to the next lane and see two 18-wheelers roar past at 70 mph with just 10 yards between them, you’ll probably think they are dangerously close. In this high-tech age, that may no longer be true. In fact, it might be just the opposite, and it might even end up saving you money. A wave of new technology intended to make trucks safer – using radar, cameras and reflective light scanning – is sweeping the industry.