1 5 ), ▁British ▁baron et ▁and ▁soldier ▁ ▁See ▁also ▁ ▁William ▁N apper ▁( disambiguation ) <0x0A> </s> ▁The ▁A 4 1 6 1 ▁is ▁a ▁main ▁road ▁in ▁Card iff , ▁Wales , ▁United ▁Kingdom . ▁The ▁main ▁purpose ▁of ▁the ▁road ▁is ▁to ▁link ▁the ▁city ▁centre ▁with ▁the ▁M 4 ▁motor way ▁in ▁the ▁west ▁at ▁j unction ▁ 3 3 , ▁and ▁in ▁the ▁east ▁with ▁the ▁A 4 8 ( M ) ▁motor way ▁at ▁St ▁M ell ons . ▁▁▁ ▁The ▁ 1 9 2 3 ▁route ▁of ▁the ▁A 4 8 ▁was ▁the ▁main ▁east – west ▁link ▁in ▁south ▁Wales . ▁ ▁The ▁A 4 8 ▁in ▁Card iff ▁was ▁re - number ed ▁to ▁the ▁A 4 1 6 1 ▁on ▁ 1 9 ▁November ▁ 1 9 7 1 ▁when ▁the ▁Eastern ▁Avenue ▁dual ▁carriage way ▁became ▁the ▁A 4 8 . ▁By ▁ 2 ▁November ▁ 1 9 7 5 , ▁Queen ▁Street ▁was ▁partly ▁ped est rian ised ▁and ▁ 2 ▁sub ways ▁were ▁opened ▁under ▁North ▁Road ▁and ▁Bou lev ard ▁de ▁N antes ▁to ▁allow ▁the ▁A 4 1 6 1 ▁then ▁to ▁move ▁from ▁Queen ▁Street ▁to ▁Dum f ries ▁Place , ▁Stuttgart ▁Str asse , ▁Bou lev ard ▁De ▁N antes . ▁The ▁A 4 8 ▁section ▁between ▁Rum ney ▁and ▁St ▁M ell ons ▁later ▁became ▁the ▁B 4 4 8 7 ▁and ▁Southern ▁Way ▁( A 4 2 3 2 ) ▁was ▁built