Secondary roads in Oman are the third category of road in the Omani route numbering system and are designated with route numbers beginning with "S", from S10 to S46
The secondary road system was established on December 18, 2019 by the Ministry of Transport (now the Ministry of Transport, Communications and Information Technology), through the Road Numbering and Classification Guide. The guide outlined thirty-six distributor roads detailing their official classification, names, start and end point and distances.
According to the 2017 Road Design Guide, secondary roads are required to meet the following standards: