The Southern Main Road is a major road in Trinidad and Tobago running from Curepe in the north through Chaguanas, Couva, San Fernando, and Point Fortin to Icacos in the southwest, over a now discontinuous length of 120 km.
The Southern Main Road makes its way through communities such as Caroni, Cunupia, Chaguanas, Freeport, St. Mary's, McBean, Couva, Pt.
Lisas, California, Claxton Bay in Central Trinidad, before passing into Marabella, Vistabella and San Fernando.
The Southern Main Road remains a major thoroughfare for many communities, especially in the central and southwest areas of the island.
It then runs alongside the Sir Solomon Hochoy Highway towards Chase Village, eventually diverging from the highway into Couva, Claxton Bay and Marabella before terminating at Zurcher St at Vistabella in San Fernando.