In the interest of safety I would highly recommend that private passenger vehicles (cars, SUV, van, etc) would have a higher speed limit than commercial/utility vehicles (such as trucks, delivery vans, semi trailer, etc). That way the speed limit can be increased for vehicles that can utilize this, while for safety's sake trucks and the like should remain slower, for obvious reasons (physics).

130kph is already equivalent to around 80mph which is quite fast for road conditions over there. Hindi naman ganoon kaganda ang kalsada dyan, mahirap na to increase the speed limit that much. Maybe 110 or 120kph pwede pa. Also note that there are a significant number of commercial vehicles that are not well maintained, some aren't even maintained at all. I would not want to lift the speed limit for these vehicles if the current one works already. We all know the Pinoy mentality na if you give in to their demand there will be some who will exploit that.

There's no need to get empirical evidence for these "enforcers" because, as Dr. Kamiya stated, it's their domain of control and it's their prerogative