Dates

M4 in Wales Statistics and options

Section
Construction started
Opened to traffic
Newhouse-Coldra (J2(M48) to J24)
1963
August 1967
Newport by-pass (J24 to J28)
Aug 1962 & April 1963
May 1967
Newport by-pass widening (J24 to J28)
May 1978 & April 1980
April 1980 & Autumn 1981
Tredegar Park-St Mellons (J28 to J29A(A48(M))
November 1975
October 1977
Castleton-Coryton (J29 to J32)
October 1977
July 1980
Coryton-Miskin (J32 to J34)
September 1975
December 1977
Miskin-Pencoed (J34 to J35)
September 1975
December 1977
Bridgend Northern by-pass (J35 to E of J37(A48))
October 1977, June 1978 & November 1978
September 1981
Pyle by-pass (E of J37(A48) to J39)
April 1975(I)
June 1976(II)
November 1977
Port Talbot by-pass (J39 to J41)
February 1963
July 1966
Baglan-Briton Ferry (J41 to J42)
August 1992
December 1994
Briton Ferry-Earlswood (J42 to J43)
January 1992
December 1994
Earlswood-Lon Las (J43 to J44)
March 1990
February 1993
Morriston by-pass (J44 to J46)
August 1969
1972
Pontardulais by-pass (J46 to J49)
August 1974
April 1977