 The section from the Capel Llanilltern Interchange on the M4 ( junction 33 ) to the Queen 's Gate roundabout is sometimes referred to as the Western Link Road ( Welsh : Ffordd Gyswllt Gorllewin ) , is 15 @.@ 77 kilometers ( 9 @.@ 80 mi ) in length and includes the Capel Llanilltern – Culverhouse Cross Link Road , Ely Link Road , Grangetown Link Road and Butetown Link Road . For the majority of this section it is the boundary between the City of Cardiff to the east and the Vale of Glamorgan to the west . 
 The section from the Capel Llanilltern Interchange on the M4 ( junction 33 ) to the Queen <a href='null_genetive' title='1'><mark>'s</mark></a>Gate roundabout is sometimes referred to as the Western Link Road ( Welsh : Ffordd Gyswllt Gorllewin ) , <a href='drop_aux' title='2'><mark>is</mark></a>15 @.@ 77 kilometers ( 9 @.@ 80 mi ) in length and <a href='uninflect' title='3'><mark>includes</mark></a> the Capel Llanilltern – Culverhouse Cross Link Road , Ely Link Road , Grangetown Link Road and Butetown Link Road . For the majority of this section it <a href='drop_aux' title='4'><mark>is</mark></a>the boundary between the City of Cardiff to the east and the Vale of Glamorgan to the west . 
Da section from the Capel Llanilltern Interchange on the M4 ( junction 33 ) to the Queen  Gate roundabout is sometimes referred to as tdaWestern Link Road ( Welsh : Ffordd Gyswllt Gorllewin ) , 15 @.@ 77 kilometers ( 9 @.@ 80 mi ) in length and include the Capel Llanilltern – Culverhouse Cross Link Road , Ely Link Road , Grangetown Link Road and Butetown Link Road . fir the majority of this section it thdaoundary between the City of Cardiff to the east and the Vale of Glamorgan to the west .