Around half of all vehicles randomly checked on the roads were polluters, with exhaust emissions exceeding legal limits, the Pollution Control Department said.
Officials ordered 234,176 commercial vehicles - lorries, trailer trucks, buses and pickups - to pull over for exhaust fume checks last year, and 114,888 of them, or 49%, were over the limit, director-general Atthapol Charoenchansa said in a statement issued on Monday.
