https://travelmapping.net/user/mapview.php?rg=PHLphlsky: Metro Manila Skyway (one route split from E2 in phle, since it's no longer signed or otherwise inventoried as E2, and the other is a new route)
phlah: Asian Highways
phlp: Primary National Roads (1-2 digits)
phls: Secondary National Roads (3 digits)
All but phls are now in preview. Note that a number of portions of phlah will also be in phls.