On November 7, 1975, President Ferdinand Marcos issued Presidential Decree No. 824 creating Metro Manila and its managing public corporation, the Metropolitan Manila Commission (MMC) after the residents of the affected cities and municipalities approved the creation of Metro Manila in a referendum held on February 27, 1975. The move consolidated the Philippine capital Manila and adjacent Quezon City with two cities and twelve municipalities of the province of Rizal and one municipality of the province of Bulacan into Metro Manila and designated Metro Manila as the national capital region of the Philippines.^[4] Marcos appointed his wife, First Lady Imelda Marcos, as governor^[5] and Ismael Mathay Jr. as vice governor.^[6] The office was located in front of the present-day GMA Network at EDSA corner Timog Avenue in Diliman, Quezon City.^{[citation needed]} November 7, thus, is marked as the anniversary of both the region and the government body that supervises it, the MMDA.

On May 29, 1976, President Ferdinand Marcos issued Presidential Decree No. 940, restoring the City of Manila as the capital city of the Philippines, and designating Metro Manila as the permanent seat of national government.^[7]

The MMC became effectively defunct when on January 9, 1990, President Corazon Aquino issued Executive Order No. 392, in accordance to Article 18, Section 8 of the 1987 Philippine Constitution which replaced the commission with the Metropolitan Manila Authority (MMA).^[8] The Metro Manila mayors will choose from themselves as chairman. Jejomar Binay of the municipality of Makati served as its first chairman. The agency transferred to its office at the intersection of Epifanio de los Santos Avenue (EDSA) and Orense Street in Guadalupe Nuevo, Makati. Binay was followed by Ignacio Bunye of the municipality of Muntinlupa in 1991, Ismael Mathay Jr. of Quezon City in 1992 then Prospero Oreta of the municipality of Malabon in 1994.^{[citation needed]}

Since the elected chairman is one of the mayors of Metro Manila, the role to their constituency gave less attention. Thus, the Congress of the Philippines, composed of the Senate and the House of Representatives, passed Republic Act No. 7924 creating the Metropolitan Manila Development Authority (MMDA) on March 1, 1995. President Fidel V. Ramos appointed former Malabon mayor Prospero Oreta, who did not run in the Malabon municipal election, as the first Chairman of the MMDA in May 1995 and made him independent of the Metro Manila mayors.^{[citation needed]}

In August 2017, the MMDA has adopted the use of a black beret in order to improve its public image.^[9] The berets are used by the traffic enforcers under the agency, which alternate these with a black baseball cap.

On May 23, 2022, President Rodrigo Duterte inaugurated the new headquarters of the MMDA at the intersection of Doña Julia Vargas Avenue and Molave Street in Ugong, Pasig. The building was initially conceptualized by a collaboration between former MMDA Chairman Danilo Lim and the Makati chapter of the United Architects of the Philippines in 2018, with the conceptual design being done by architect Daryl Van Abaygar and was constructed by the Robinsons Land Corporation.^[2]

• Highway Patrol Division also part of the Traffic Enforcement Division
• Road Emergency Group
• Traffic Enforcement Division
• Traffic Engineering Center
• Towing Services

The governing board and policy making body of the MMDA is the Metro Manila Council, composed of the mayors of the cities and municipalities.

The heads of the Department of Transportation (DOTr), Department of Public Works and Highways (DPWH), Department of Tourism (DOT), Department of Budget and Management (DBM), Department of Human Settlements and Urban Development (DHSUD), and Philippine National Police-National Capital Region Police Office (PNP-NCRPO) or their duly authorized representatives, attend meetings of the council as non-voting members.

The council is the policy-making body of the MMDA.

• It approves metro-wide plans, programs and projects and issues rules, regulations and resolutions deemed necessary by the MMDA.
• It may increase the rate of the allowances and per diems of the members of the council to be effective during the term of the succeeding Council. It fixes the compensation of the officers and personnel of the MMDA, and approves the annual budget thereof for submission to the Department of Budget and Management (DBM).
• It promulgates rules and regulations and sets policies and standards for metro-wide application governing the delivery of basic services, prescribes and collects service and regulatory fees, and imposes and collects fines and penalties.

The council consists of voting and non-voting members. Voting members are the mayors of the localities in Metro Manila, as well as the Presidents of the Metro Manila Vice Mayors League and the Metro Manila Councilors League. Non-voting members are representatives by the following who serve as council members ex-officio:^[10]

• Department of Budget and Management
• Department of Tourism
• Department of Transportation
• Department of Public Works and Highways
• Department of Human Settlements and Urban Development
• and the Philippine National Police National Capital Region Police Office

The MMDA has traffic jurisdiction over Metro Manila's ten radial roads, five circumferential roads and other roads it may include to enforce traffic laws and traffic management activities. However, the MMDA has route designations for radial roads and circumferential roads different from the route classifications of the Department of Public Works and Highways due to the MMDA's focus on only major roads and thoroughfares.^[11][12]

MMDA had TV and radio stations sometimes carrying the same brand, MMDA Teleradyo. They ceased on August 17, 2010.

• MMDA Traffic Radio 1206 - Traffic updates can be heard on this station. It was started as a test broadcast on September 24, 2007.
• MMDA TV - Traffic updates are Live Feed by Monitoring Cameras Along the streets of Metro Manila with simulcast over MMDA Traffic Radio 1206. It was started as a test broadcast on August 20, 2008.

To compensate for the closure of these communication mediums, the MMDA turned to social media such as Twitter to broadcast traffic updates to users following them. Live billboards, particularly at EDSA, have been also constructed. The MMDA app for iOS and Android have also been made available for free, broadcasting traffic updates directly.

Since 2014, the agency took over the mothballed Pasig River ferry system in anticipation of huge traffic along the metropolis, from the Skyway Stage 3 construction. In reviving the defunct transportation, many of the old ferry stations were reactivated and new vessels purchased. Ridership of the waterway service increased over time since the agency's takeover, with the offering of discounts to students and senior citizens, until these were made totally free of charge. The MMDA intends to continue operating the ferry service until a private investor takes over.

Since 2003, the MMDA has implemented a No Contact Apprehension Policy in apprehending traffic violators in Metro Manila using traffic enforcement cameras and closed-circuit television to capture violators without the presence of an on-site traffic enforcer.

To ease traffic congestion on main roads in Metro Manila, the MMDA under Chairman Francis Tolentino launched Christmas Lanes, marking 17 alternative routes for motorists during the Christmas season of 2014. Since then, they have been renamed as year-round Mabuhay Lane, designating alternative routes on roads that should be cleared of obstructions at all times. This was underscored by strict parking restrictions, where parked motor vehicles along these priority roads would be immediately towed.^[13]

The MMDA is tasked to clear obstructions from the roads at all times, and conducts daily clearing operations against stalled and illegally parked vehicles, with subcontracted towing companies. Illegally parked vehicles will be given 5 minutes to leave, and will be towed otherwise. Incapacitated vehicles are almost immediately towed to clear traffic.

Primary and secondary roads, unless with designated parking areas, are considered "No-Parking-Zones".

Starting from Bayani Fernando's term, the MMDA has constructed elevated pedestrian footbridges in an effort to "provide safe walkways for pedestrians" and promote "faster traffic flow". As of June 2023, a total of 133 footbridges have been built by the MMDA Traffic Engineering Center.^[14]

However, these footbridges have been criticized for not being accessible to people with disabilities (PWDs), posing dangers to pedestrians due to their steep steps, slippery surfaces, and poor lighting,^[15] and for prioritizing motor vehicle travel speeds over the convenience and safety of pedestrians.^[16] To address this, some footbridges have been outfitted with elevators. However, several of these elevators have become notorious for being in a state of disrepair.^[17][18]

The MMDA under Bayani Fernando implemented a "no left-turn" scheme in the early 2000s along several major roads in Metro Manila, prohibiting motor vehicle traffic from turning left at intersections and instead requiring them to make a U-turn at designated U-turn slots and making a right turn after. These U-turn slots were designed to mimic the Michigan left turn design by creating continuous traffic, mitigating bottlenecks caused by traffic light signals.^[19]

The scheme was controversial due to longer travel time and difficulties in navigating to these U-turn slots. Several academic studies also summarized that the "no left-turn" design was only beneficial under low traffic conditions and minimal lane changing, as the U-turn slots also became congested themselves.^[19][20] Following the end of Fernando's term, many of these U-turn slots were closed and left-turning at most intersections was restored, although some still remain along roads such as EDSA, Quezon Avenue, and Circumferential Road 5.

A short-lived curiosity all around Metro Manila is the pink urinals made popular by Bayani Fernando, which he implemented prominently in Marikina in an effort to curb public urination. They have since been removed, however, with remaining urinal units distributed instead to local government units.

The MMDA operates and maintains several pumping stations in strategic areas of Metro Manila with the aim of mitigating flooding risks, especially during inclement weather. Old pumping stations that previously used diesel engines were upgraded in 2015 to use electric motors. Of the 54 pumping stations across the country, 12 stations have been equipped with new pumps in 2016.^[21] Additional pumping stations are also being constructed in flood-prone areas as part of the agency's flood mitigation program.

Starting with Bayani Fernando's tenure, the Estero Blitz (Waterway Blitz) became an annual waterway clearing operation with emphasis on river dredging activities, particularly at flood-prone areas, to reduce the risk and impact of flooding all over the metropolis. The clearing operation is usually conducted during the dry summer season.

The Gwapotel Inn is a cheap hotel run by the Metropolitan Manila Development Authority.^[22] A second Gwapotel was announced in December 2007.^[23]

The Gwapotel along Roxas Boulevard is renamed the MMDA Workers Inn, and operated until 2017. It was closed due to deteriorating structure and will be rehabilitated/transferred at an unspecified date. The Abad Santos Gwapotel has since been converted into their training barracks.

The Court of Appeals says the MMDA is not among the government agencies deputized to implement RA 9211 or the Tobacco Regulation Act of 2003. The CA added that the MMDA has no police or legislative power to implement the law. It declared invalid MMDA Resolution No. 11-19, which the agency used as basis to implement its anti-smoking campaign.^[24]

A first metro-wide earthquake drill was conducted on July 30, 2015, to prepare the public in the event of a magnitude 7.2 earthquake. Various government agencies, educational institutions and the private sector participated in the drill spearheaded by the Metropolitan Manila Development Authority (MMDA). Different scenarios were re-enacted to simulate a destructive earthquake that is expected to happen when the 100-kilometer (62 mi) West Valley Fault moves.^[25] Buoyed by its success the MMDA has since hosted annual regional drills for the capital.

In the past, such practices were justified by rhetoric that street children need to be 'rescued' from the street. Advocacy groups contend that in seeking to create a beautiful metropolis, the MMDA often treat Metro Manila's urban poor like 'rubbish' on the street.^[26]

A report from PREDA that was funded by UNICEF, claims inhumane proceedings to caught vagrants.^[27]

In 2018, the MMDA constructed the Kamuning Footbridge, a pedestrian footbridge connecting Scout Borromeo Street and NIA South Road in Quezon City. The footbridge has been the subject of ridicule since its construction due to its steep height and the agency's responses defending it as "prioritizing safety over convenience" and "only for the able-bodied".^[28][29] As of 2025, the footbridge is planned to be rebuilt by the Department of Transportation to be more inclusive and convenient for road users and commuters.^[30]

• Capital City Authority
• Department of Transportation
• Department of Public Works and Highways
• Department of Tourism
• Department of Budget and Management
• Department of Public Works and Highways
• Department of Human Settlements and Urban Development
• Philippine National Police
• Metro Manila
• Office of the President
• Pasig river rehabilitation
• Metro Manila Dream Plan^[31]