Road signs in the Philippines are regulated and standardized by the Department of Public Works and Highways (DPWH).
[3][4] The Philippines signed the convention on November 8, 1968, and ratified it on December 27, 1973.
It contains a reproduction of the former Australian implementation AS1744-1975 Standard Alphabets in the appendix pp A103-A146.
[1] They are triangular and red-bordered, similar to warning signs used in Europe.
[1] Hazard markers are signs that are usually used in places with obstructions and curves.