Dear Transport Department

I am looking for information concerning the use of alternating black and white markings on the edge of road kerbs occasionally found in some places. Specifically:

1. What is the official name used to refer to such markings;
2. What are the official operational criteria for deploying such markings over standard unpainted concrete kerbs;
3. Does this specific marking carry any statutory obligations or restrictions for road users under Hong Kong motor traffic laws, and if otherwise then what is its purpose (e.g. strictly used as an advisory measure to enhance visibility);
4. In what year did the government first officially adopt the practice of painting such markings, and what was the initial basis for doing so;
5. Under what specific departmental circular, directive, or policy paper first mandated the adoption of such markings, and a description and/or copy of the specific document if available.

Please provide this to me as required by the Code on Access to Information. If any charge is to be levied please let me know beforehand as I may not proceed further with that part of the request. I appreciate the help and look forward to your prompt response.

Yours faithfully

J A Wilson