Nov 13, 2021 · Reflector Road Stud On Motorway Rate Synchronous Flashing Cat's eye (road) - Wikipedia Flashing blue LED cat's eyes were demonstrated on the TV show Accident Black Spot, aired on Channel 4 on 19 December 2000, which alert the driver to potential ice on the road when a low enough temperature, provisionally set at 3 C (37 F), is reached.