Too bad for Rad, and many other private motorists who drive diesel engine vehicles (cars, vans, AUVs, trucks). He did not know the ASBU guys, only the one who issued him the ticket as these people do not wear IDs, or if they do, they hide it.
These ASBUs only flag down private diesel vehicles even if there are no obvious sights or signs of smoke belching. But they generally allow buses, jeepneys and tricycles that are obviously smoke belchers, like these, photos I got from the web.
The ASBU in Makati was known for large scale extortion too. Last year, after receiving too many complaints of extortion and improper testing procedures, Makati Mayor Junjun Binay deactivated the unit. But the ASBUs inPasay, Pasig, Manila, QC, etc., they continue the racket, highway robbery.
Anti-Smoke Belching Racket, Part 2, September 15, 2011
Anti-Smoke Belching Racket, Part 3, November 25, 2011
Anti-Smoke Belching Racket, Part 4, September 25, 2012
Anti-Smoke Belching Racket, Part 5, April 02, 2013