Penarth Road was a road located in Cardiff. It was close to the River Taff.
Gwen Cooper travelled along Penarth Road on a taxi journey from her flat in Riverside to the Torchwood Hub. (PROSE: Another Life)
In 2009, Gwen Cooper and Rhys Williams travelled along Penarth Road, after crossing the River Taff from Harrowby Street, in the direction of St Mary Street; this was all in order to reach Cardiff's Central Police Headquarters. (PROSE: Bay of the Dead)
An alien creature later caused a pileup of traffic on the Taff Embankment near Penarth Road. (PROSE: Harm's Way)