Region: London
M4. Chiswick to Slough By-pass (J1 to J5)
Section
Construction started
Opened to traffic
Chiswick flyover (J1)
? 1957
September 1959
Chiswick to Slough (J1 to J5)
July 1962
March 1965
Heathrow spur (J4)
?
March 1965
