M4. Maidenhead to Wickham (J8 to J14) Statistics and options.

Section Construction started Opened to traffic
M25 to Langley (J5) March 1963 March 1965
Slough By-pass (J5 to J7) April 1961 March 1963
Slough & Maidenhead By-pass widening (J5 to J9) October 1969 October 1971
Maidenhead By-pass (J7 to J9) April 1959 May 1961
Holyport to Winnersh (J9 to J10) December 1969 December 1971
Reading - Wokingham link interchange A329(M) September 1971 February 1973
Winnersh to Theale (J10 to J12) January 1970 December 1971
Theale to Wickham (J10 to J14) December 1969 December 1971