SETS was commissioned to undertake the necessary studies and the detailed design of the following primary roads in Riyadh Region:

- Dualling of Riyadh/Khurays/Ehsaa Road along 90 km within Riyadh Region
- Second Ring Road Link (Sheikh Jaber Road Extension) between Dammam Road and Prince Salman Road (15 km)
- Upgrade of Sheikh Jaber Road between Makkah Road and Dammam Road (11 km)
- Improvement of a number of interchanges including Exit 14, Exit 21, the intersection of Al Hassan Bin Hussein and the Eastern Ring Road