Originally Posted by
Doors to Automatic
It would make sense for "danger" runways (i.e. those with active intersections) to have a strip of bright lights a few hundred metres in that stay red and only turn green once clearance is given. This system already exists on taxiways so why not on runways?
They've got it at CDG. Particularly useful because of the two sets of parallel runways, so there's constantly landing traffic crossing over the takeoff runways. (They tend to land on the outer runways and take off from the inners)