Keep right on to the traffic-lights.

[tedmc]

It's not necessary, when giving directions, to remind people that they must stop at a red light.

From your post No.9.

In BrE, telling someone to go straight through a set of traffic lights would be encouraging them to break the law. We use that when people have carried on driving despite the traffic lights being red. If we want to tell someone that they shouldn't turn left or right when they get to the traffic lights but should stay on the same road, we say "Go straight across at the traffic lights".

Aren't the two statements contradictory?

 

[emsr2d2]

I was merely pointing out that saying "Go straight through the [traffic] lights" could be taken as an instruction to ignore a red light, whereas "Go straight on at the [traffic] lights" is not. I was not suggesting that, when giving directions, I would feel the need to add "unless the light is red" at the end of the latter. Common sense (and the Highway Code) should prevail.