officers notebooks and pens. All officers wear a police badge (known in New York as a "shield") on their left chest, in regular and ceremonial uniform. The colour and style changes with rank. Districts There are currently 11 police districts within the MTA Police Department: Specialized units The department has the following specialized units (details): Canine (K-9) Unit - provides special police dog support Computer Crimes Unit Emergency Services Unit - police officers, with special equipment, who are trained for a variety of serious emergencies. Similar to the units of the Port Authority Police and New York City Police. Detective Division - investigates serious crimes to do with MTA Highway Unit also known as "Highway Patrol" - patrols and protects the MTA bridges, highways, tunnels and other roads. Homeless Assistance Unit Interagency Counterterrorism Task Force - works with other New York state and city agencies. Discovery Unit Executive Protection Unit Hybrid Threat Unit Fare Evasion Task Force Body Worn Camera Unit Communications Unit Emergency Operations Internal Affairs Bureau Technology & System Development Right of Way Task Force Training Unit Applicant Investigations Patrolman's Benevolent Association The MTAPD has a Patrolman's Benevolent Association, which is a union for the MTA Police officers, from the ranks of "Officer" to "Lieutenant" inclusive. The MTA website states: Social media The MTAPD has a Twitter account, that it uses to disseminate useful information for users of the MTA. See also List of law enforcement agencies in New York Port Authority of New York and New Jersey Police Department New Jersey Transit Police Department New York City Transit Police (does not exist, absorbed into NYPD in 1995) Transit police References External links Transit police departments of the United States Metropolitan Transportation Authority Specialist police departments of New York (state) Specialist police departments of Connecticut Law enforcement agencies of New York City