[COM] M2 Northern Connector | 15.5km | $867m

[ChillyPhilly]

Probably not worth the cost of building that exit, it would be quicker to exit at Port Wakefield Road as you cross it, so the only people using that exit would be people who missed that turn off.

Same logic with why there there's no southbound exit ramp at Waterloo Corner Rd

What logic?
T2T there's an on ramp heading north off Port Road, and an off ramp heading south there as well.
Cant get off heading north, cant get on heading south.

Port Road is one of the major arterials, so is Salisbury Hwy.
Similar situation at Grand Junction Road.

Three major arterial roads, and not one of them has on/off ramps in all relevant directions for the NS motorway.
Not every one of them needs it in all directions, but surely they should have added them in all directions on at least one.

The Motorway ramps to/from Port Road can be found a short distance to the south.

[rev]

Same logic with why there there's no southbound exit ramp at Waterloo Corner Rd

What logic?
T2T there's an on ramp heading north off Port Road, and an off ramp heading south there as well.
Cant get off heading north, cant get on heading south.

Port Road is one of the major arterials, so is Salisbury Hwy.
Similar situation at Grand Junction Road.

Three major arterial roads, and not one of them has on/off ramps in all relevant directions for the NS motorway.
Not every one of them needs it in all directions, but surely they should have added them in all directions on at least one.

The Motorway ramps to/from Port Road can be found a short distance to the south.

There's an on ramp heading north and an off ramp heading south, immediately north of the cross over of port road.
Thats it.
Getting on or off just before the brickworks is not an off/on ramp for port road.

Three major arterials that dont have on/off access in both directions thats pretty poor.

[Bacon]

There's an on ramp heading north and an off ramp heading south, immediately north of the cross over of port road.
Thats it.
Getting on or off just before the brickworks is not an off/on ramp for port road.

Three major arterials that dont have on/off access in both directions thats pretty poor.

I’d assume the continuation of the NSM would have the ramps south of Grange Rd. Grand Junction is serviced by the ramps just South of the Days Road intersection. I guess the approach they are going for is more roads being serviced with less ramps

There’s no logical reason for anyone to make a left turn onto Salisbury highway unless they are lost. Take the Bolivar exit.

[mattwinter]

What logic?
T2T there's an on ramp heading north off Port Road, and an off ramp heading south there as well.
Cant get off heading north, cant get on heading south.

Port Road is one of the major arterials, so is Salisbury Hwy.
Similar situation at Grand Junction Road.

Three major arterial roads, and not one of them has on/off ramps in all relevant directions for the NS motorway.
Not every one of them needs it in all directions, but surely they should have added them in all directions on at least one.

The Motorway ramps to/from Port Road can be found a short distance to the south.

There's an on ramp heading north and an off ramp heading south, immediately north of the cross over of port road.
Thats it.
Getting on or off just before the brickworks is not an off/on ramp for port road.

Three major arterials that dont have on/off access in both directions thats pretty poor.

It must be pretty deliberate right? The idea is the motorway is designed for those travelling longer distances and if every major road around has easy access to the motorway then the motorway will be at capacity very quickly. Freeways aren't designed to take all the traffic flow, just to take a decent proportion of the traffic so that overall traffic is spread evenly across the major roads. There's always the surface level south road for those who need to use that for a bit.

[Spotto]

It must be pretty deliberate right? The idea is the motorway is designed for those travelling longer distances and if every major road around has easy access to the motorway then the motorway will be at capacity very quickly. Freeways aren't designed to take all the traffic flow, just to take a decent proportion of the traffic so that overall traffic is spread evenly across the major roads. There's always the surface level south road for those who need to use that for a bit.

Exactly!

With the government still figuring out what it's going with the NSM tunnel we need to keep the focus on traffic travelling straight through Adelaide (that includes SEF access via Cross Road). Local traffic between Port Road and Anzac/Cross should be kept to surface South Road and the tunnel to be used for through traffic only, otherwise, every single car in Adelaide will want to use it and the traffic problems won't be solved they'll just be transferred from South Road to NSM.

Anzac Highway and Cross Road will probably be configured in parts that as a whole will provide full access to the City via Anzac Hwy and SEF via Cross Rd. Airport access via Don Bradman should ideally be the only other local traffic kept in mind for entry/exits on NSM. But nowhere else.

[marbles]

are there any examples of tunnels interstate

[Goodsy]

are there any examples of tunnels interstate

Brisbanes Airport Toll Road and the Clem Jones Tunnel would probably be on the same scale

[ChillyPhilly]

If four tunnel boring machines are used, a tunnel from T2T to Darlington could be constructed in about eighteen months.

Reading up on roadheads, which were used for Melbourne's Burnley and Domain Tunnels, this might be a better option.

[SBD]

If four tunnel boring machines are used, a tunnel from T2T to Darlington could be constructed in about eighteen months.

Reading up on roadheads, which were used for Melbourne's Burnley and Domain Tunnels, this might be a better option.

What are roadheads?

Is the dirt/rock under the North South Corridor comparable with Melbourne's? It might be as the are both essentially floodplains, but could have different stuff under the sediment.

[ChillyPhilly]

If four tunnel boring machines are used, a tunnel from T2T to Darlington could be constructed in about eighteen months.

Reading up on roadheads, which were used for Melbourne's Burnley and Domain Tunnels, this might be a better option.

What are roadheads?

Is the dirt/rock under the North South Corridor comparable with Melbourne's? It might be as the are both essentially floodplains, but could have different stuff under the sediment.

My typo, I meant roadheaders. They're more versatile than TBMs and are being used throughout Melbourne's Metro Tunnel project.

I did a quick Google Images search of soil types, and Adelaide's soils are mainly types of clay, whereas Melbourne has quite a mix (basalts and mudstones).

[Norman]

The southern interchange now has a 90km/h speed limit. There are still works happening along the Salisbury Highway to Superway ramp to reduce it from 2 lanes to 1 lane.

[marbles]

my god the pot holes around regency are waaaaay too big, theyre gonna pop my tyres and i will send them the bill

[Norman]

According to DPTI, the second stage of the shared use path is now open.

[Leigh744]

So it's only been a few months since they rebuilt the entire PREXY through the southern interchange and they are already digging up the road in parts heading east. Anyone have any idea why? Plus, how much longer is it going to take to finish the work heading west onto the NSM? Driving 60km/h both east and west is getting tiring.

[Norman]

For those interested, here are some updated daily traffic figures for the Northern Connector:
Wingfield to Bolivar: 44,400
Bolivar to Waterloo Corner: 43,200
Waterloo Corner to Virginia: 35,700

Traffic has also reduced on the surrounding road network, except of course the Superway.

Salisbury Highway
2015: 69,300
2020: 40,900

Port Wakefield Road - Mawson Lakes to Bolivar
2015: 58,600
2020: 25,800

Port Wakefield Road - Bolivar to Waterloo Corner
2015: 48,800
2020: 19,900

Port Wakefield Road - Waterloo Corner to Virginia
2015: 41,300
2020: 12,900

North-South Motorway (Superway)
2015: 36,200
2020: 48,600