It's the cats eyes in the centreline.
C'mon Rainboe they are called Runway Certreline Lights....Cats Eyes are what you get:-
a, in a cat
b, Reflective Glass held ib a rubber/plasticised covering to reflect the beams of "Motor Vehicle Lights" to enhance safety,[ie marking lanes] on the Queens Highway.
I made that lot up.......
watp,iktch