Overview

• Resolution 1196/2025 from the Secretariat of Transport was published in the Boletín Oficial, putting the new regime into effect.
• Bitrenes can now use the entire Red Vial Nacional, with prior authorization required only for 55 mountain curves in Salta, Jujuy and Tucumán and one in Chubut, and with bridge limits governed by structural capacity.
• The rule unifies treatment across categories and removes extra paperwork that delayed Category 3 approvals by more than 90 days; previously only 26.5% of national routes and 11% of Buenos Aires province were open to these vehicles.
• The government says the change increases per‑trip capacity by up to 60–75%, reduces logistics costs and emissions, and aligns criteria with the City of Buenos Aires.
• Provincial officials, notably Buenos Aires transport minister Martín Marinucci, criticize the move as a safety risk that could worsen damage on poorly maintained roads.