| Country: | ESP |
| Type: | Autovia |
| Route: | AS-III |
| Alternate Name: | Autovía del Acero |
| Length Km: | 24 |
| Terminus A: | Langreo |
| Terminus B: | Avilés |
The AS-III is a highway in Asturias, Spain that connects Langreo and Avilés. Despite being a splitting of the AS-17 road, it continues working with this name.
The first section of the motorway was opened in October 2011 and links Lugo de Llanera with Viella, Siero.[1]
On 12 July 2014, the section between Riaño, Langreo and San Miguel de la Barreda was opened. This section has three tunnels and cost €108m.[2]