"In this moment of pain, mourning and shock, I offered my heartfelt condolences to the Carreira family for their terrible loss", wrote Marcelo Rebelo de Sousa, in a note published on the Presidency of the Republic's website.
Sara Carreira died in a collision involving four light vehicles, which occurred at 19:00 on Saturday on the A1 motorway, which was cut off to traffic until 00:51 between Santarém and Cartaxo.
Her death was declared at the scene, with three others being injured, one seriously.