There are thousands of traffic light junctions in the UK where you can watch an empty junction for ages. This would improve traffic flow enormously and make far better use of our limited road resources.
Turning left on a red traffic light is illegal even when there is no traffic and you are looking at an empty junction. Lights have been set regularly for volumes of non-existant pedestrians (four sets within a mile of me)
The ability to turn right on red (mirror image – they drive on the right) when safe to do so has been in use in North America for generations without problems. Only junctions where this is NOT allowed are marked.