Agree ako kay Otep on this. Thats why its called a "passing lane". If im driving 80 at NLEX and someone is faster than me coming from behind then I yield. Its a matter of respect for the other person who wants to use the passing lane for passing slower vehicles. Remember that the speed limit is 100. If you are doing 80 then then you are under the speed limit. You need to yield to those who are in the speed limit.