Transport for NSW will be carrying out urgent repairs to the heritage listed dry stone retaining wall and guard rail barrier, include some road resurfacing on Old Northern Road, at the last bend before entering Wisemans Ferry.

During full road closures, local access to Old Northern Road will be maintained under traffic control via Wisemans Ferry Road and River Road for residents and businesses located on either side of the work site.

General access will be maintained to the area north of the work area however using the following alternate route. Please note this route may take approximately 2 hours and 20 minutes of additional travel time so please plan accordingly.

• Old Northern Road at Maroota, to Castle Hill Road, Pennant Hills Road, M1 Pacific Motorway, Peats Ridge Road, George Downes Drive and Wisemans Ferry Road to access the northern side of the Hawkesbury River. Note that the vehicle ferry will be required to cross to the township of Wisemans Ferry.
• There are other local access routes in the area but these are not recommended due to the condition of the road not being suitable for high volumes of traffic or any heavy vehicles.

The work will take place from:

• 7am to 5pm Thursday 9 December and Friday 10 December – single lane closure
• 9pm Sunday 12 December to 6am Wednesday 15 December – full road closure
• Wednesday 15 December and Thursday 16 December from 6am to 9pm single lane closure, and from 9pm to 6am the following day, full road closure
• 6am Friday 17 December to 9pm Sunday, 19 December – single lane closure
• 9pm, Sunday 19 December to 6am Monday 20 December – full road closure
• Monday 20 December and Tuesday 21 December – from 6am to 9pm single lane closure, and from 9pm to 6am the following day, full road closure