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| Santiago Metro Line 3 | |
|---|---|
| Name | Line 3 |
| Native name | Línea 3 |
| System | Santiago Metro |
| Locale | Santiago, Chile |
| Start | Plaza Quilicura |
| End | Fernando Castillo Velasco |
| Stations | 18 |
| Opened | 22 January 2019 |
| Owner | Empresa de Transporte de Pasajeros Metro S.A. |
| Operator | Metro S.A. |
| Character | Underground, Elevated |
| Depot | Quilicura depot |
| Stock | Alstom AS-2014, NS-93 |
| Linelength km | 22.5 |
| Electrification | 750 V DC third rail |
| Mapcolor | Yellow |
Santiago Metro Line 3 is a rapid transit line of the Santiago Metro network in Santiago, Chile. Opened in January 2019, it connects northern and southeastern sectors through central corridors and integrates with lines serving Providencia, Ñuñoa, Santiago Centro, and Quilicura. The line was developed amid urban mobility projects tied to municipal and national initiatives and forms part of metropolitan strategic transport planning overseen by national and regional authorities.
Line 3's origins trace to long-term plans by the Ministry of Transport and Telecommunications (Chile) and Metro planning documents from the 1990s and 2000s that envisioned new cross-city axes to reduce congestion on Avenida Libertador Bernardo O'Higgins, Avenida Vicuña Mackenna, and Providencia Avenue. Early feasibility studies involved consultants linked to Banco Interamericano de Desarrollo, CAF – Development Bank of Latin America and the Caribbean, and private engineering firms. The project was formally approved under the administration of President Michelle Bachelet and advanced during the term of President Sebastián Piñera. Construction contracts were awarded to consortia including Acciona, OHL-linked companies, and local constructors coordinated by Metro S.A. Delays and redesigns occurred amid legal challenges involving municipal governments such as Quilicura and La Reina, as well as environmental assessments submitted to the Servicio de Evaluación Ambiental.
Line 3 runs roughly northwest–southeast from Plaza Quilicura to Fernando Castillo Velasco in La Reina. Major interchange stations include connections with Line 1 at Universidad de Chile, Line 2 at Puente Cal y Canto, Line 4 transfer points near Tobalaba, and links to Metrotren Nos and surface buses at multimodal hubs. Stations such as Plaza Chacabuco, Carmen Gloria, and Monseñor Eyzaguirre serve residential sectors, universities, and commercial corridors including proximity to Universidad de Santiago de Chile, Universidad Católica, and cultural sites in Barrio Bellavista. Several stations are designed with public art commissions involving local artists coordinated with the Ministerio de las Culturas, las Artes y el Patrimonio and municipal cultural programs.
The infrastructure includes twin-bore tunnels, elevated viaducts in Quilicura, and modernized substations with 750 V DC third-rail electrification similar to systems used by Metro de Madrid and Paris Métro. The line's depot and workshop facilities are located in Quilicura depot, enabling stabling and maintenance of electric multiple units. Rolling stock deployed comprises Alstom AS-2014 trains manufactured in collaboration with local assembly facilities and NS-93 series retained from fleet reallocations, featuring regenerative braking systems, automatic train protection compatible with CBTC trials, and air-conditioning units adapted to Santiago's climate. Signaling upgrades drew on suppliers such as Thales and links to European signaling standards to support headways as short as 3–4 minutes.
Operated by Metro S.A., Line 3 runs weekday peak services with enhanced frequencies coordinated with central interchange timetables for Line 1 and Transantiago surface networks. Typical service pattern includes all-stops local trains; operational control is centered in Metro's central control rooms that also manage Lines 1, 2, and 5 through integrated traffic supervision. Fare integration uses the Tarjeta Bip! contactless system aligned with municipal bus services and suburban rail tickets negotiated with the Ministry of Transportation and Telecommunications (Chile). Night and weekend schedules are adjusted during city events staged at venues like Estadio Nacional Julio Martínez Prádanos and cultural festivals supported by Corporación Cultural de Las Condes.
Since opening, Line 3 has redistributed passenger flows, relieving pressure on congested nodes such as Plaza de Armas (Santiago), Baquedano interchange, and sections of Avenida Libertador Bernardo O'Higgins. Early ridership studies, conducted with academic partners including Pontificia Universidad Católica de Chile and Universidad de Chile, reported substantial modal shift from buses and private vehicles, reducing travel times for commuters from Quilicura and La Reina. Socioeconomic impact assessments by regional planning agencies documented improved access to employment centers like Costanera Center and health facilities such as Hospital Clínico Universidad de Chile, while municipal development plans in Recoleta and Providencia incorporated transit-oriented development strategies.
Construction phases involved cut-and-cover tunneling in central sectors and immersed and TBM methods in deeper stretches; key contractors included multinational and Chilean firms under oversight from Metro S.A. and the Ministerio de Obras Públicas (Chile). Future extension concepts have been proposed to extend northwest services deeper into Colina and southeast links toward La Reina Centro, with proposals discussed by municipal councils and transport authorities such as Subsecretaría de Transportes. Funding scenarios considered public investment, public–private partnerships with entities like CORFO, and multilateral loans from Banco Interamericano de Desarrollo.
Incidents during construction included localized flooding and archaeological finds managed with the Museo Histórico Nacional and heritage authorities, while operational incidents have been limited to service disruptions and occasional technical faults addressed by Metro's emergency protocols. Safety measures follow standards endorsed by the Dirección del Trabajo (Chile) for construction sites and the Instituto de Seguridad del Trabajo for occupational safety, plus passenger safety systems such as platform edge warnings, CCTV surveillance, emergency intercoms, and regular drills coordinated with Cuerpo de Bomberos de Santiago and Carabineros de Chile.
Category:Transport in Santiago de Chile Category:Rapid transit lines in Chile