 It was originally named Calle del Puerto ("Port Street"); the name was changed in 1887 to honour Independence War hero General José de San Martín.San Martín St. starts near the river at Belgrano Avenue and climbs towards the downtown area.At the intersection with Santa Fe St. it is normally closed to traffic, and it becomes a highly commercial pedestrian-only street one block to the south, upon meeting Córdoba St. (also pedestrian-only at this point).