Penusila Express between Tirupathi and Guntur via Narasaraopeta, Vinukonda, Darsi, Kanigiri, Pamuru, Rapuru, Venkatagiri and Sri Kalahasthi.
The name Penusila comes from Penchalakona, the abode of Sri Nrisimha Swamy, located near Rapuru. Penusila (Huge Rock) is the word which later turned into Penchala.