The Inter-Agency Council on Traffic launches its own web portal to receive criticism of Manila commuters.

The “I Will Act” portal encourages people to submit their traffic-related complaints to the government. This includes but not limited to illegal public vehicle terminals, sidewalk obstructions, unattended excavations and even kotong enforcers.
Complainants should send complete information about him or herself plus details like date, place, and photos or videos for proof. He or she is also obliged to be present for a hearing to push through with the case.
Check out the portal at http://www.mmda.gov.ph/i-will-act.
I agree with the previous comments but would like to take my commenting approach on a different tone.
My take is just make the proofs (pictures and/or videos) mandatory. I think if a traffic problem is really bothersome for a lot of motorists, then I-ACT will receive a lot of complaints for it. Given such scenario, I-ACT could then commission a task force, even a very small group, to verify the problem. If found true (which is most likely the case), they could then plan out resolution steps for said problem using even a very large task force if needed.
Taking the chance (hopefully someone who works in Paranaque City Hall gets to read this), I strongly nominate review of the situation in Sto. Nino Paranaque especially the vicinity in front of the central post office. The make shift market in there – the line of stores after the dilapidated bridge, chokes traffic very heavily during mornings even as early as 6AM. I have been running that route going home from work since February this year and there was never a time when that area did not have traffic mess. From illegally parked cars, PUVs loading/unloading anywhere and everywhere, counterflows, jaywalkers and the very bad road condition – any motorist can really just wish for reprieve.
Thanks and cheers to wishing less and less traffic problems for every Filipino!