Just so you are aware, they do sporadic radar checks on the tollway. The Hwy. Patrol wait at the tollbooths, pull you over and give you a ticket. Thus far, I've not been aware of offering 'consideration' has worked. If you get a ticket, it's a royal pain in the butt. You have to go to Quezon City to retrieve it and, in many cases, attend a day-long seminar on traffic safety.
They set up between Diniluphian and the Tipo exit in the Subic direction and after Porac going the opposite direction.
A couple of years ago, I bought a radar detector. It's saved my butt several times.