 The PDR has been constructed in separate link roads of between 1 @.@ 61 km ( 1 @.@ 00 mi ) and 5 @.@ 47 km ( 3 @.@ 40 mi ) around Cardiff and to date 22 kilometres ( 14 mi ) including spurs have been opened to traffic , with plans for a further 5 @.@ 53 km ( 3 @.@ 44 mi ) . It has 4 large viaducts ( Ely Viaduct , Grangetown Viaduct , Taff Viaduct and the East Moors Viaduct ) , 1 tunnel ( Queen 's Gate Tunnel ) and 2 spur roads ( Cogan Spur and Central Link Road ) . The road also has many smaller bridges over or under most of the interchanges on the road . The entire length of the road has clearway restrictions on it . 
 The PDR <a href='been_done' title='1'><mark>has</mark></a> been constructed in separate link roads of between 1 @.@ 61 km ( 1 @.@ 00 mi ) and 5 @.@ 47 km ( 3 @.@ 40 mi ) around Cardiff and to date 22 kilometres ( 14 mi ) including spurs <a href='been_done' title='2'><mark>have</mark></a> been opened to traffic , with plans for a further 5 @.@ 53 km ( 3 @.@ 44 mi ) . It <a href='got' title='3'><mark>has</mark></a> 4 large viaducts ( Ely Viaduct , Grangetown Viaduct , Taff Viaduct and the East Moors Viaduct ) , 1 tunnel ( Queen <a href='null_genetive' title='4'><mark>'s</mark></a>Gate Tunnel ) and 2 spur roads ( Cogan Spur and Central Link Road ) . The road also <a href='got' title='5'><mark>has</mark></a> many smaller bridges over or under most of the interchanges on the road . The entire length of the road <a href='got' title='6'><mark>has</mark></a> clearway restrictions on it . 
The PDR done been constructed in separate link roads of between 1 @.@ 61 km ( 1 @.@ 00 mi ) and 5 @.@ 47 km ( 3 @.@ 40 mi ) around Cardiff and to date 22 kilometres ( 14 mi ) including spurs done been opened to traffic , with plans fir a further 5 @.@ 53 km ( 3 @.@ 44 mi ) . It got 4 bigass viaducts ( Ely Viaduct , Grangetown Viaduct , Taff Viaduct and da East Moors Viaduct ) , 1 tunnel ( Queen  Gate Tunnel ) and 2 spur roads ( Cogan Spur and Central Link Road ) . The road also got many smaller bridges over or under most of the interchanges on the road . Tdaentire length of the road got clearway restrictions on it .