The Ely Link Road ( Welsh : Ffordd Gyswllt Trelái ) between the Culverhouse Cross Interchange ( 51 @.@ 465840 ° N 3 @.@ 269895 ° W ﻿ / 51 @.@ 465840 ; -3.269895 ﻿ ( Culverhouse Cross Interchange ) ) and the Leckwith Interchange ( 51 @.@ 470641 ° N 3 @.@ 211762 ° W ﻿ / 51 @.@ 470641 ; -3.211762 ﻿ ( Leckwith Interchange ) ) , sometimes referred to as the Leckwith Road Interchange . It is 4 @.@ 83 km ( 3 @.@ 00 mi ) in length and was opened in 1982 and built by Davies Middleton & Davies Ltd ( DMD ) . It was designed to relieve Ely of through traffic and partly cut into Leckwith Hill .