There are of roads in the municipality of San Luis (excluding logging roads). These are classified into national, provincial, municipal and barangay roads with lengths of , , , and , respectively. The most common road type is gravel road accounting for 86% of the total length of road network. Bituminous road come second (12%), followed by concrete. The road network of the municipality is found extensively at the Poblacion and radiated to some peripheral barangays. The coastal barangays are not accessible via land transport.