Northern Road on-ramp, Mulgoa

M4 Smart Motorway Project – Stage 3

The NSW Government is investing $600 million to build the M4 Smart Motorway project, which will introduce intelligent technology to the M4 Motorway between Pitt Street, Mays Hill and Mulgoa Road, Penrith.

Project information

  • Installation of maintenance bays, vehicle detection loops, emergency phones and upgrades to power and communications infrastructure
  • Realignment, extension and widening of ramps at Mamre Road interchange
  • Installation of ramp meters and ramp control signs at The Northern Road, Kent Street and Mamre Road.
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