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Contents: The Victoria Viaduct | History | Why? | Tunnel & Viaduct Project | Construction Images | St Mary's Bay | Improvements | Images | Feedback


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The Wellington Street on-ramp will be closed from the 23rd of August 2010 until November in order for the supporting walls to be constructed for the Victoria Park Tunnel. This is required for the northbound part of the project which tunnels three lanes underneath Victoria Park, while the southbound lanes use the four existing lanes on the Victoria Viaduct. More on the details of this closure here.


The Victoria Viaduct

The Victoria Viaduct was constructed during the early 1960's to link the Southern Motorway to the Auckland Harbour Bridge (AHB), replacing the link via Nelson Street and Fanshawe Street to the St Mary's Bay section.

Construction began in 1959 and in the early 1961 the viaduct opened with four lanes, the same layout exists today. Most traffic growth was expected to be carried via Fanshawe Street with the growth of the CBD. Today it carries an average of 105,512 vehicles a day (more on volumes in the Glossary).


History of the Victoria Viaduct & St Mary's Bay Area

 

When the Auckland Harbour Bridge (AHB) was completed in 1959 a small approach was built to allow traffic to travel between Fanshawe Street and the AHB, through St Mary's Bay. In 1961 the Victoria Viaduct was completed. It was constructed to offer the missing link to the Southern Motorway and onto the Newmarket Viaduct.

In the late 1980's when safety was assessed on the AHB it was proposed to install a moveable barrier system not only on the AHB but continuing around St Mary's Bay along an upgraded 5 lane Victoria Viaduct until Wellington Street. This proposal would have been perfect as it would have matched peak flows and the lane layouts of the Harbour Bridge. Unfortunately the Moveable Barrier System was only installed on the AHB in 1990.

The Victoria Viaduct comes under criticism because of how ugly it looks, the lack of stopping space, its traffic capacity and its safety. Numerous accidents have happened; such as vehicles driving through the barriers and into Victoria Park below and the risk of a single crash causing Auckland's motorway system to turn to chaos.


Why does a tunnel need to be provided?

Currently the four lane layout proves to be a bottleneck on both sides of the bridge. Traffic regularly backs up due to traffic entering at the North Western Links and Wellington Street on the southern side. On the northern side traffic flow is impeded by lane changes into the only two available southbound lanes, and further affected by traffic wanting to then exit directly after the viaduct at Cook Street and Northern to North West Links.

As the bridge was completed in 1962 and has not been retrofitted, compared to the AHB, it has issues such as Concrete Cancer (Alkali Aggregate Reaction), does not match earthquake standards, it has poor safety standards like cambers, geometric's, stopping space and barriers.


Victoria Park Viaduct & Tunnel Project

$406m including St Mary's Bay | Under Construction | Complete: 2012

Four options were proposed for the upgrade of the Victoria Park corridor. Namely: widening the existing viaduct, a sunken motorway, full two way tunnel or keeping the viaduct with a northbound tunnel. The partial tunnel option was chosen.

There will be three stages of the construction, where the tunnel will be built, opened to northbound traffic, then all four existing lanes on the Viaduct will open to southbound traffic.

Once open, three northbound lanes will be open through the tunnel which will connect with the St Mary's Bay section where it will become five lanes. The southbound lanes will use all of the existing Victoria Viaduct lanes, equalling four lanes for southbound traffic. These lanes will be split into direction being; the two left lanes will be allocated for Cook Street and Northern to North Western link. The other two far lanes will be for southbound traffic.

Sound issues, aesthetics and previous problems with the existing viaduct will be addressed and once needed a southbound tunnel will be constructed and the existing Victoria Viaduct will be demolished. One of the reasons why the southbound tunnel will not be built with this project is because of a possible tie-in with the third harbour crossing, and a compromise between benefit to cost ratio. You can have a look at the other options proposed for the upgrade here.

 

Victoria Viaduct Partial Tunnel Overview


This overview is not to scale and it represents an artists impression of the plans. It is intended as a guide. Satellite images from Bing Maps.


Construction Images


Above: Retaining wall and pile driving by Fanshawe Street on-ramp.


Above: Pile driving by the Birdcage which is to be moved.


Above: Reconstruction of the popular Victoria Skate Park.


Above: Construction alignment by Wellington Street. When complete seven lanes will occupy this space.


St Mary's Bay Widening and Improvements

 

The St Mary's Bay section is a small eight lane section between the northern foot of the Victoria Viaduct and Fanshawe Street interchange to the Auckland Harbour Bridge.

The section is a windy, busy, yet surprisingly efficient section with 141,357* vehicles per day[?]. The main reason for congestion through this section is caused by slow traffic on the Auckland Harbour Bridge and the bottleneck of the Victoria Viaduct. The proposed upgrade will address safety, noise levels and matching the surrounding capacity improvements.

The project will incorporate: A sound wall will be built alongside the western side of the motorway; five traffic lanes in both directions; a southbound bus lane; the Shelly Beach overbridge will be extended to accommodate the new northbound lane; a pedestrian bridge from Jacobs ladder to Westhaven area and increased space at the existing HMNZS Ngapona Site. The project will also incorporate an extension of the Auckland Harbour Bridge Barrier Transfer system.


Above: Artists impression of the pedestrian bridge connecting Jacobs Ladder and the Westhaven area.
This image is courtesy of the NZTA.

Images from construction


Above: Southbound widening of St Mary's Bay almost complete.


Above: Urban design along Westhaven Drive, with the new barriers.


Improvements

- Merging with Wellington Street Interchange and North Western Link traffic by adding a third lane, so traffic does not have to merge.
- Cook Street and North Western off-ramps will have two dedicated lanes to exit on. Separating exiting and southbound vehicles.
- Flow onto the Harbour Bridge; by matching the changeable lane layouts of the bridge itself. During afternoon peak five lanes will be operational with three originating from the new tunnel and two from Fanshawe Street. When the standard four to four layout is operating on the bridge there will be one lane originating at Fanshawe with a standard three from the tunnel.

Ramp signalling will also manage the flow from the on-ramps into the tunnel.

The Wellington Street on-ramp will be closed from the 23rd of August 2010 until November in order for the supporting walls to be constructed for the Victoria Park Tunnel. This is required for the northbound part of the project which tunnels three lanes underneath Victoria Park, while the southbound lanes use the four existing lanes on the Victoria Viaduct. More on the details of this closure here.


Images


Above: Victoria Viaduct from Victoria Park.




Tell us what you think about this project

Polling has closed on this project, as the project has already begun. The poll has run since 2005 and overall 86% of voters believed the project was 'good'.


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Comments

From: Steve: From the new design of barriers along Westhaven Drive it looks like you will no longer be able to see the marina from the motorway, isn't that a really silly thing to be blocking?

Answer From: Benjamin Paul | The camber of the corners in some locations requires the road to be raised higher than Westhaven Drive. This means a barrier is needed to prevent cars from going through in an impact. Therefore an Armco barrier (the metal ones with wooden posts) or a tightened wire barrier would not be suitable. Also due to the widening, the motorway is now closer to Westhaven Drive, so a sufficient barrier is needed.

From: Martin: Why only three lanes through the most congested part of Auckland City? There is still no future proofing for Auckland City being undertaken in any development, and this is another short sighted development. There needs to be at least four lanes right though from the moment you come off the Harbour Bridge until at least Onehunga. Instead as you come off the 5 lanes of the Harbour Bridge you be pushed into three. As a rate payer I am completely disappointed at the poor thought out Victoria Park tunnel, I would much rather have seen a new harbour crossing to correct the major problem we have with our current crossing.

Answer From: Benjamin Paul | The project addresses capacity issues by providing four lanes once off the Harbour Bridge where two go to the Cook St and North Western (eventually Western Ring Network) and two southbound. Overall one quarter of traffic that is heading south from the bridge exits at Fanshawe Street. Of the 53,191 cars that are left on the Victoria Viaduct 42% of that exits at Cook Street or the North Western Links. By providing this 42% another two dedicated lanes and southbound traffic two dedicated lanes, I cannot see how this is short sighted. Also the Northbound tunnel can be widened in the future. From your comment it seems that you have not looked at the proposals for the Auckland Harbour Crossing.

From: Mary | What are the plans to ensure there is no utility disruptions (water, gas, power and telecommunications) to the surrounding area during the period of construction?

Answer From: Ben Paul | Ensuring no disruption to services is always included in plans and construction.

From: Terrance | I don’t see anywhere in the plans to straighten the approach to the bridge through St Mary's bay. This is a dangerous piece of road and should cut through the lagoon to provide a safer approach.

From: Jamie | The partial tunnel approach is disappointing because we will still be looking at that ugly viaduct for many more years. In addition, there will still only be two lanes going from the Northern Motorway to the Southern Motorway. I thought one of the main purposes of all these upgrades was to provide for a 'core' of 3 continuous lanes in each direction from the Harbour Bridge to the Newmarket Viaduct, with any additional lanes on any particular section being for connections to and from the CBD, Port (via Grafton Gully) and North-Western Motorway. That made sense to me. The current plan is just another typical Transit half-measure.

Answer From: Ben Paul | There are many reasons why Transit has opted for the partial tunnel option and when all factors are weighed in, it’s the best option. For Transit to build the Victoria Tunnel in both directions it would cost around $700mn, which it would not get funding for, if it did, many factors make it even harder to complete, especially for the southbound tunnel. The gradient at the end of the tunnel is too steep to allow for the appropriate gradient, the tunnel would have to be constructed outside of the Motorway corridor due to the foundations of the existing Viaduct and would take much longer to complete. Other issues include the second harbour crossing implementation, because the final option for the second harbour crossing has not been confirmed Transit would like to leave all options open, as the second harbour crossing is likely to have priority for southbound traffic and northbound using the existing Harbour Bridge with public transport sharing. With this priority the southbound direction of the Victoria Tunnel needs to be left open for all options. The tunnel for southbound will eventually be completed. Also one thing needs to be looked at: If you are getting 7 lanes through an existing 4 lane corridor would the extra $300m+ to build another 3 underground (the southbound tunnel if built at this stage would only be 3 lanes wide) be better spent on projects that are more urgent than putting a 300m section underground? I would rather see that money in the short term spent on the Newmarket Viaduct also and public transport and the western ring motorway.

 

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