Engineering has transformed the streetcar of the past into a high-performance vehicle that redefines the urban landscape, promoting accessibility and energy efficiency without the visual pollution of catenaries.

When technique organizes space, society gains time to live. The observation needs to cross the century to describe the latest metamorphosis of the light rail vehicle, which left behind the nostalgia of the tourist tram to establish itself as the backbone of modern urban development.

Alstom, the French mobility giant, catalyzes this transformation by selling more than 1,500 full low-floor LRV units worldwide. The internal architecture of the new trains eliminates any steps, allowing boarding at platform level and establishing a new paradigm of universal accessibility.

Guillaume Mehlman, President of Alstom Transportation in North America, highlighted in an interview with Metro Magazine that speed has become a crucial factor for the success of the mode. To connect urban centers to distant suburbs, the new light rail vehicles (LRVs) need to reach 65 miles per hour, equivalent to about 105 km/h.

This capability of crossing metropolitan areas at high speed fills the gap between heavy metro and urban buses. The promise is ambitious: to offer the best compromise between passenger capture, service level, and optimization of invested public money.

The third wave of this technological revolution, however, lies in what is not seen. The APS (Alimentation Par le Sol) system, or ground-level power supply, eliminates the need for overhead catenary wires, preserving the aesthetics of historic centers and circumventing complex civil engineering obstacles such as viaducts and utility networks.

It is a catenary-free operation technology that supplies power to the train via a segmented third rail installed between the sleepers, activating magnetically only under the vehicle. Bordeaux was the living laboratory of this innovation in 2003, currently operating 15 of its 43 kilometers of network with this ground-level power supply system.

Under the relentless sun of the Persian Gulf, the Dubai Tramway in Al Sufouh represents the most emblematic application of this clean engineering. Phase 1 of the project, which entered operation at the end of 2014, connects 10 kilometers of track and 13 stations with 11 modern Citadis trams, all operating fully on APS technology.

The system preserves the city's futuristic landscape without the interference of wires and poles, powering the moving trains with total safety. The choice of APS in an extreme desert environment demonstrates the robustness of the technology, which has become a global reference for high-quality surface corridors.

Economic and environmental sustainability enters the equation with decisive weight. Mehlman argues that, compared to BRT (Bus Rapid Transit) buses, well-planned LRV systems can pay for themselves over the lifecycle cost, with drastically lower energy and maintenance costs.

This is because the onboard braking energy recovery technology and the efficiency of electric traction reduce consumption to levels that rubber tires on asphalt will never reach. The initial deployment cost difference, the executive insists, is limited compared to the enormous operational benefits that accumulate over the following decades.

For the North American market, the Dualis platform — an evolution of the Citadis family — was designed to meet stringent local crash resistance standards and the Americans with Disabilities Act (ADA) requirements. It is a wide, high-capacity vehicle with a completely flat floor, ready for networks that can start small and progressively expand, as the cities of Phoenix and Dallas did.

The leap from Medellín's cable car to the rails of the Middle East shows that quality public transportation is not a monopoly of the developed world, but the result of courageous design decisions. The contemporary light rail, equipped with APS, 105 km/h performance, and floor at ground level, redefines the citizen's relationship with time and the city landscape.

In a Brazil that still debates the feasibility of surface corridors, it is worth looking at this technical evolution not as a distant luxury, but as the inevitable path towards less unequal and more fluid cities. While projects such as the Baixada Santista light rail, detailed in functional studies by SYSTRA, try to get off the drawing board, the technology available in the world has already proven that the surface is noble when the rails set the pace.

Editorial Team