 At the request of residents, it was extended in 1964 to the corner of Paraná and 9 de Julio, in front of the Rosario Oeste railway station of the Ferrocarril General Manuel Belgrano.In 1967, to optimize fleet utilization, lines G and J were merged, and line M opened to connect San Martín and Muñoz with the Santa Fe–Cafferata bus terminal.Following these changes, lines M, H and K were operating with 45 trolleybuses in total.