Responsible for providing all law enforcement services for the capital city of Bangkok and its suburbs, the Metropolitan Police was probably the most visible and publicly recognizable of all TNPD components. This largely uniformed urban force operated under the command of a commissioner, who held the rank of police major general and was assisted by six deputy commissioners. Organizationally, the force consisted of three divisions, each responsible for police services in one of the three urban areas: northern Bangkok, southern Bangkok, and Thon Buri. Together they accounted for about forty police precincts, which were patrolled around the clock.
In addition to covering the city with foot patrols, the Metropolitan Police maintained motorized units, a canine corps, building guards, traffic-control specialists, and law enforcement personnel trained to deal with juvenile problems. The Traffic Police Division also provided mounted escorts and guards of honor for the king and visiting dignitaries and served as a riotcontrol force to prevent unlawful demonstrations and to disperse unruly crowds within the capital city.