Cat's eye road markings on M8 Motorway: FOI release

"I was driving recently on the M8 Motorway on the section to the east of the newly constructed section when I was concerned that the cat's eyes do not appear to be working properly.

Please let me know:

1. Do the cat's eye road markings on this stretch of road comply with all relevant regulations?
2. Frequency of inspections carried out to check the cat's eyes are functioning correctly.
3. Date of last such inspection.
4. Outcome so far as it relates to the cat's eye road markings."

This was then clarified to "The section of motorway involved is between Junctions 5 and 6 – westbound."