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In Buenos Aires, a Megaproject of R$ 261.1 Billion Uses Ring Tunnel and Bridge to Eliminate Critical Crossings, Link Neighborhoods to Costanera Norte, and Cut Travel Time in the Northern Zone by Up to 50%.
In an intervention estimated at around R$ 261.1 billion, Buenos Aires bets on the La Pampa Ring Road to integrate mobility, landscape, and infrastructure into a single layout. At the center of the proposal is the ring tunnel and bridge, which separates vehicle, pedestrian, and cyclist flows and creates a new rapid axis between residential neighborhoods, green areas, study zones, and the airport, shortening the path to Costanera Norte.
More than just alleviating congestion, the La Pampa Ring aims to transform an old traffic knot into a strategic connection corridor between the consolidated city and the waterfront. By concentrating traffic in a continuous tunnel and providing an exclusive elevated ring for pedestrians and cyclists, the project combines heavy engineering and urban design to reshape the daily life of those crossing the northern zone of Buenos Aires.
How the Ring Tunnel and Bridge Reorganize the Northern Zone of Buenos Aires
The La Pampa Ring Road is born to confront one of the region’s greatest urban barriers: the intersection of the Arturo Illia Highway with the Belgrano Norte railway.
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Today, this traffic knot concentrates at-grade crossings, traffic lights, and constant conflicts between cars, trains, pedestrians, and cyclists, lengthening travel time during peak hours.
With the ring tunnel and bridge, the project takes vehicle traffic to a continuous underground corridor, while non-motorized circulation gains an exclusive elevated circuit.
The idea is to separate flows that currently intersect at different levels and times, reducing mandatory stops, risk points, and bottlenecks along the route.
By reorganizing access between the inner city and the waterfront, the La Pampa Ring improves the connection between neighborhoods such as Bajo Belgrano and Palermo and strategic destinations in the northern zone of Buenos Aires, creating a more direct path towards Costanera Norte.
How the Combination of Tunnel and Ring Bridge Works
The complex consists of two main components: a two-way tunnel for vehicles and a circular bridge exclusive for non-motorized travel. It is this combination of tunnel and ring bridge that transforms a chaotic intersection into an integrated mobility system.
Underground, the tunnel passes beneath La Pampa Street at the height of Lugones Road, crossing the Arturo Illia Highway and the Belgrano Norte tracks, directly connecting inner neighborhoods to Costanera, Aeroparque, Ciudad Universitaria, and Parque Costero.
With two lanes in each direction, the underground corridor allows vehicle flow to traverse the old traffic knot without traffic lights and without direct interactions with pedestrians and trains.
On the surface, the ring bridge, with a diameter of approximately 140 meters, creates a continuous circuit for pedestrians and cyclists.
At its highest point, this ring incorporates a panoramic viewpoint, offering views of the city, the river, and the air traffic at Jorge Newbery Airport.
The same structure that solves a traffic problem also becomes a new space for staying, strolling, and observing the urban landscape.
Impacts on Travel Time and Mobility in the Northern Zone
The design of the ring tunnel and bridge was conceived to eliminate at-grade crossings, traffic lights, and conflict points between different modes of transport.
By concentrating the flow of cars into an underground axis and elevating pedestrians and cyclists to an independent route, the project drastically reduces the interruptions that currently extend travel time.
In practice, the promise is to cut travel time in the northern zone by up to 50% during peak hours, especially for those moving between inner neighborhoods and Costanera Norte. With fewer stops, fewer bottlenecks, and fewer maneuvers in congested areas, the trip becomes more predictable and continuous.
In addition to reducing time, the La Pampa Ring aims to:
Increase road safety by separating local traffic from through traffic and reducing direct encounters between cars, trains, pedestrians, and cyclists.
Decongest main roads and adjacent neighborhoods by offering a more direct alternative to reach the waterfront and the main facilities in the northern zone of Buenos Aires.
Decrease pollutant emissions since a smoother flow reduces constant accelerations and braking, typical of areas with traffic lights and series of crossings.
Facilitate the transport of goods and access to commercial and industrial areas by shortening important logistical connections in the region.
Technical Characteristics and Urban Role of the La Pampa Ring Road
From a technical and urban standpoint, the La Pampa Ring Road stands out for combining underground engineering, landscape design, and architectural branding in a single intervention.
The two-lane, two-way tunnel passes beneath the area where La Pampa Street, the Illia highway, and the Belgrano Norte railway currently overlap.
On the surface, the circular structure with a diameter of 140 meters occupies over 10,000 square meters of reorganized area.
The ring was designed to be visible from parks, highways, train stations, and even from aircraft flying over the region, establishing itself as a new urban icon in the northern zone of Buenos Aires.
The mixed-use of the ring bridge, combining pedestrian walkway and bike lane in a continuous circuit, reinforces the idea of multimodal mobility.
At the same time, the viewpoint at the highest point transforms the structure into an attraction for residents, students, and visitors, connecting the experience of daily commuting to moments of contemplation of the city and the river.
Deadlines, Investment, and Future of the Strategic Corridor
According to the City of Buenos Aires government, the works on the La Pampa Ring Road began in January 2026, with an estimated execution time of about 20 months.
The projected investment exceeds 50 billion dollars, which is approximately R$ 261.1 billion, encompassing the construction of the two-lane tunnel, the circular bridge, the accesses, and the requalification interventions in the immediate surroundings.
At the end of this construction cycle, it is expected that the tunnel and ring bridge will consolidate the La Pampa Ring as a strategic corridor in the northern zone of Buenos Aires, integrating the consolidated city with the waterfront, increasing road safety, enhancing the landscape of Costanera Norte, and reorganizing over 10 thousand square meters of currently fragmented urban space.
Beyond the numbers, the megaproject poses an important test: to what extent can a specific intervention, combining tunnel and ring bridge, reshape daily travel time and the way the city interacts with the river and its main mobility axes?
And you, do you think megaprojects like this are worth such a high investment to reduce travel time and create new urban icons, or should the priority be other mobility solutions in daily life?
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