A car and a truck collided on the AU 25 de Mayo highway near Centenera, blocking a lane and slowing traffic toward downtown Buenos Aires this Thursday, August 20, 2026. Authorities have restricted the right lane while emergency crews work. Here's what you need to know and alternative routes to avoid the jam.

What Happened on the AU 25 de Mayo?

In the early morning of Thursday, August 20, 2026, a collision between a car and a truck occurred on the Autopista 25 de Mayo (25 de Mayo Highway) at the height of Centenera, a neighborhood in the southern part of Buenos Aires. The incident was first reported by user Ernesto Arriaga on Twitter at 07:41 AM, who alerted that the right lane was reduced in the accident zone.

The highway is one of the busiest corridors connecting the western suburbs with the heart of Argentina's capital, and the timing—during peak rush hour—has caused significant delays for drivers heading toward the city center.

How to Avoid the Congestion

If you're commuting toward downtown Buenos Aires, authorities recommend the following:

  • Use alternative routes: Avenida General Paz, Avenida Alberdi, or Avenida Directorio are good options to bypass the affected area.
  • Check real-time navigation apps before you leave—traffic conditions can change quickly.
  • Keep a safe distance from emergency vehicles and follow instructions from traffic officers.
  • Consider public transport: Several bus lines run along Avenida La Plata, or you can take the train—both may be faster during this disruption.

Traffic is expected to return to normal by mid-morning once the cleanup is complete, but delays are likely to persist for a while.

Why This Highway Matters

The Autopista 25 de Mayo (AU 25 de Mayo) is a vital artery for the Greater Buenos Aires metropolitan area. Opened in 1980, it connects the Buenos Aires–La Plata Highway with the Dellepiane Highway, linking the western districts—such as Morón, Ituzaingó, Merlo, and Moreno—to the capital. Thousands of drivers rely on it daily, and even minor incidents can create a funnel effect, quickly clogging side streets and alternate roads.

This kind of accident is one of the leading causes of travel delays in the region. While authorities work to clear the scene, patience and planning are key. Remember to stay informed through official channels and local traffic reports.

We'll update this story as more details emerge. In the meantime, drive safely and consider your options before heading out.