The 13 "S" bus lines are managed by Astral with long-distance buses. They connect the suburbs to the city centre in correspondence with interchange nodes and in support of Cotral and Atac services, offering an alternative to the metro lines during weekdays and in particular time slots.

All holders of Metrebus Rome or Lazio tickets and passes valid in tarif zone A are allowed on board the "S" lines.

Details of routes and stops of the "S" lines are available HERE.