M3 J6 Black Dam Interchange

Layout and signage

Basingstoke
Newbury
Alton
A339
Reading (A33)
  (A33)
(A339)
      Basingstoke
Newbury
Alton
A339

Lane configuration

LanesLanesLanesLanesLanes

  • Lane 1 continues, with option to exit.
  • Lane 2 continues ahead.
  • Lane 3 continues ahead.

LanesLanesLanesLanesLanes

  • Lane 1 continues, with option to exit.
  • Lane 2 continues ahead.
  • Lane 3 continues ahead.

In this section

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M1 under construction

Pictures taken as the first section of the M1 was being built in 1958-9, with all its unique architecture still under construction.

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