A mobile court of the Bangladesh Road Transport Authority on Tuesday filed 12 cases and realised Tk 11,500 from 12 CNG-run bus companies in Dhaka for taking excess fare. The court, led by BRTA executive magistrate (deputy secretary) Abdur Rashid, filed the cases during the drive conducted at the National Press Club, Motijheel, Kamalapur and Khilgaon. The court checked tickets at different counters of the bus operators and found that they were charging Tk 3 to Tk 10 more than the government-fixed rate announced recently after the CNG price hike.