On 4 January 1936, Argentina began a significant expansion of National Route 9. The project aimed to improve transportation links between Buenos Aires, Córdoba, and northern provinces. Engineers modernized road surfaces and introduced new safety measures. The project encouraged trade and supported the movement of agricultural goods. It also strengthened national connectivity at a time when automobile use was rising. The road became one of the country’s most important highways. Its continued upgrades reflect the long-term value of the original expansion effort.
