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Toll collection booths are not planned for the third lane of Imigrantes Highway (Alexsander Ferraz/AT)

The future third lane of Imigrantes Highway will not include toll plazas. If a tariff is charged — something that has not yet been defined by the State Government — it will be collected through electronic gantries (free flow). The measure is expected to speed up truck traffic, as the new lane may accommodate heavy vehicles bound for the Port of Santos, on the coast of São Paulo.

The director of the Agência de Transporte do Estado (Artesp), Raquel França Carneiro, told A Tribuna that the installation of gantries “needs to be discussed and technically evaluated.”

“The third lane is a somewhat different project. In the alignment we have been discussing with Ecovias (Imigrantes, the concessionaire), it starts at the level of the interchange. Therefore, it will have a slightly different gradient and is composed almost entirely of tunnels”, she explained.

The free flow system is already being implemented in the Sistema Anchieta-Imigrantes (SAI) and will soon replace the toll plazas located in Riacho Grande and Piratininga.

Progress

February is expected to bring an important step in the project for the construction of the third lane. According to Ecovias Imigrantes, which is responsible for the project, the executive design is expected to be delivered by the end of the month and will then be submitted for certification by an independent company.

The functional and basic designs were delivered in February and October 2025, respectively. According to Artesp, all stages of environmental licensing currently underway with Cetesb — including the Preliminary License and Installation License — are expected to be completed by the end of the first half of 2026.

Only after the completion of these stages will precise characteristics of the undertaking be defined, including materials to be used, construction techniques, schedule, and costs for the subsequent execution of the works. The expectation is that construction will begin by the end of this year.

“The third-lane project under development meets the request of the Governo do Estado for a new connection between the Planalto region and the Baixada Santista, with a focus on heavy vehicles, minimal environmental impact, and capacity to meet current and future traffic demand”, argues Ecovias Imigrantes.

The proposal consists of a new lane in the Serra section with a length of 21.5 km, composed primarily of tunnels totaling 17 km, equivalent to 80% of the entire route, in addition to 4 km of viaducts. One of the tunnels will be approximately 6 km long.

The new connection is expected to cost R\$ 8 billion and increase capacity for heavy vehicles in the SAI by more than 140%.

Project results in logistical gains

Experts interviewed by A Tribuna emphasize the logistical gains that the future connection between the Planalto and the coast may provide. According to Marcos Vendramini, director of V2PA Engenharia, the future highway will directly benefit downhill traffic toward Guarujá (Left Bank of the Port of Santos), the North Coast, and indirectly the remainder of the Sistema Anchieta-Imigrantes (SAI).

“It will contribute to reducing bottlenecks, such as at the end of the Anchieta descent, at the intersection with Cônego Domenico Rangoni, at its interchange with the uphill lanes of the SAI, and at the interchange between the Sistema Anchieta-Imigrantes and the beginning of the descent of Via Anchieta (southbound lanes in the Planalto).”

Vendramini believes that road safety should increase by providing a greater number of lanes, better escape areas, much larger curve radii, as well as greater stopping distances (Via Anchieta is very winding).

Increased flow

For the director of Agência Porto Consultoria, Ivam Jardim, the third lane of Imigrantes is essential to relieve the bottleneck in the Serra do Mar, especially for truck traffic bound for the Port of Santos. “The project tends to reduce congestion on the descent of the Serra, increase road safety, and shorten travel time, which is positive for port logistics. This gain is concentrated in the Serra section”, he assesses.

Jardim notes, however, that attention from the State Government is needed for sections that will not be altered. “The same trucks and light vehicles will continue to converge onto Imigrantes in the Diadema–São Bernardo do Campo section, which already experiences frequent congestion, and toward the Cubatão–Santos corridor, which operates with heavy flow during peak hours. Without interventions at these points, part of the gain achieved in the Serra tends to be absorbed by new bottlenecks”, he adds.

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Toll plazas

Third lane of Imigrantes Highway will not have toll plazas on the coast of São Paulo

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