 This section partly opened in 1978 , from the Rover Way – Lamby Way roundabout to the Llanedeyrn Interchange on the A48 is oldest section of the PDR . It includes only the Southern Way Link Road , known locally as Southern Way , and is 2 @.@ 25 km ( 1 @.@ 40 mi ) in length . 
 This section partly opened in 1978 , from the Rover Way – Lamby Way <a href='uninflect' title='1'><mark>roundabout</mark></a> to the Llanedeyrn Interchange on the A48 <a href='drop_aux' title='2'><mark>is</mark></a>oldest section of the PDR . It <a href='uninflect' title='3'><mark>includes</mark></a> only the Southern Way Link Road , known locally as Southern Way , and <a href='drop_aux' title='4'><mark>is</mark></a>2 @.@ 25 km ( 1 @.@ 40 mi ) in length . 
This section partly opened in 1978 , from the Rover Way – Lamby Way roundabouted to the Llanedeyrn Interchange on the A48 oldest section of the PDR . It include only da Southern Way Link Road , known locally as Southern Way , and 2 @.@ 25 km ( 1 @.@ 40 mi ) in length .