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Discussion Starter #1
So, I finally managed to get my hands on renders of the proposed N2/N3 Spaghetti Junction upgrade, and thought it deserved its own thread given its iconic status as Africa's first 4-level interchange.

As has been previously announced, the upgrade will involve an arch support and cost in the region of R2.5-billion. There's currently no timeframe on this project as various costing models are being considered, but it seems likely SANRAL will focus on this once the Umhlanga Interchange is completed (or hopefully sooner, given the major traffic jams and accidents that happen at this interchange). Regardless of when this will commence, this interchange will look amazing when done (hopefully before 2022)!!! :cheers:


Here's a 2014 media report quoting the SANRAL project manager attached to the project...

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...Project manager, Ravi Ronny has added that plans to upgrade the EB-Cloete interchange, which is part of the N3, are also in place.

He says an arch-structure would be created over the four-level interchange to accommodate additional lanes.

Ronny says the structure alone will cost in the region of two to R2.4-billion, highlighting that funding remains an issue.

"Part of the whole N3, between Durban and Pietemaritzburg, as I said the initial coast for the phase one which is we need to do in the next five years, how we'll be able to fund this thing because the substantial capital will be required because of the type of projects they are.

"And we think government needs to make the decision whether we can get some funding from national treasury or all of the funding or no funding and whether the user pay principle, you know with the toll plazas, whether that's an option," he said.

Ronny has been speaking at a media round table discussion in Durban.

More here: http://www.ecr.co.za/post/r15bn-needed-to-upgrade-n3/

And... here's some renders, from Ronny's presentation...





Source: www.projectmanagement.org.za/resource/resmgr/ravi_ronny.pdf
 

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Discussion Starter #2
Here's the tender call for reviewing / auditing the proposed upgrade design:

Title: Undertake an Independent Detailed Design Road Safety Audit for EB Cloete IC

Description: Call for Quotation to Undertake an Independent Detailed Design Road Safety Audit for EB Cloete IC. SNA Civil & Structural Engineers (Pty) Ltd were appointed for detailed design of the upgrade of the EB Cloete IC. Jeffares & Green (Pty) Ltd was appointed to conduct a Peer Review on the postulated design. Jeffares & Green calls for Tenders on behalf of the South African National Roads Agency SOC Ltd (SANRAL) for the Detailed design road safety audit of the EB Cloete IC. This project is in the province of Kwa–Zulu Natal and in the metro municipality of Ethekwini. The EB Cloete Interchange is a Four – Level Interchange linking both the N2 and N3. The N2 is located on level 2, the N3 on level 3 and the N3 to N2 ramps on levels 1 and 4. Levels 2 to 4 comprise of bridge structures. The proposed upgraded interchange consists of widening of the N2 and N3 bridges as well as ramp A (joining the N3 eastbound to the N2 southbound) and ramp B (joining the N3 westbound to the N2 northbound) bridges. Also proposed is a modification to the existing trestle structure in which the middle leg will be replaced by a cable supported from a new steel arch structure. This tender calls for an independent Road Safety Audit to review the detailed design drawings. Firms with road safety and traffic engineering experience are therefore invited to submit a quote to undertake an Independent Road Safety Audit.

http://www.l2b.co.za/Tenders/Tender/View?ID=8f179c08-3e0f-44e0-acb9-414f06f02c61
 

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Our second Moses Mabhida? Haha

Still flabbergasted by the price, can't see why it has to be so high? The new interchange in umhlanga is only R750million from scratch. This is almost the price of the actual Moses Mabhida stadium which was R3 odd billion.
 

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Still don't really understand this! What is the idea of removing the middle "leg" of the trestle structure? It doesn't seem to be the element that is restricting widening. The main obstacle to widening the N3 seems to be the pillars that extend from each end of the trestle to support the fourth level.
 

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Extensive "peak Hour" traffic monitoring has been taking place at this intersection over the last few months. Hatch Goba may possibly be involved with determining the traffic flow matrix before final designs can be completed.
 

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Spoke to one of the design engineers over the weekend, still going to happen and whilst the cost may seem high you have to understand that the construction process won't affect the traffic as much as some of the current projects have. For those who use N2/ M41, you would know the havoc it causes every day so this would help a great deal with the smooth flow (well sort of) and construction taking place.
 

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timescale?

driving through the construction works at the umhlanga N2/M41 interchange the other day on a quick stopover in Durban, it looks much more impressive than the N2/N3 interchange already
 

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Discussion Starter #14
Nzimande outlines Sanral projects that will benefit from R3.5bn stimulus package
26TH FEBRUARY 2019

BY: NADINE JAMES

Transport Minster Blade Nzimande on Tuesday revealed that the R3.5-billion set aside for transport under the Economic Stimulus and Recovery Plan would be used to supplement funding in three key focus areas, namely the N2 Wild Coast road (N2WCR) upgrades, in the Eastern Cape, the N3 upgrades, in KwaZulu-Natal and the Moloto road upgrades, in Limpopo and Mpumalanga.

...The N3 upgrades will focus on the stretch of road between Durban and Pietermaritzburg.

The first phase includes upgrades to the road between Cato Ridge and Pietermaritzburg, comprising ridge alignments and improvements to the EB Cloete interchange. The entire first phase is valued at R13-billion.

...He highlighted three of the seven projects – the EB Cloete Interchange, which links the N2 and N3 in eThekwini and is being upgraded to the tune of R1.5-billion...


More here: http://www.engineeringnews.co.za/art...26/rep_id:4136
 

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This is what the N2 and N3 will look like after a R28 billion revamp
James de Villiers, Business Insider SA
Aug 06, 2019, 09:59 AM

Sanral said it will issue R8.3 billion worth of tenders for the N2 and N3 freeway projects by the end of the year.

The upgraded N2 and N3 will see the construction of four or five lanes in each direction and the redesign of interchanges.

It will cost an anticipated R28.4 billion, and take between five to eight years to construct.

More Info: https://www.businessinsider.co.za/n3-n2-freeway-project-durban-r28-billion-sanral-2019-8
 

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New upgrades coming to South Africa’s busiest highways

The South African National Roads Agency (Sanral) is currently making a number of upgrades to two of South Africa’s busiest highways – the N2 and N3.

The agency said that it plans to spend R28 billion on improvements to the highways in the coming months – including an increase in the number of lanes, and configuration changes to some of the busiest interchanges.

“As a road authority, Sanral’s primary sphere of influence is engineering. However, the N2 and N3 upgrade programme will allow for the facilitation of an integrated approach to improve safety for all road users,” it said.

“It is not just human factors, such as speeding, not wearing seat-belts or careless driving, that increase the risk of a crash occurring. Poor road design can also cause crashes.”

In addition to the above upgrades, Sanral said that it would also be looking to make the following changes:

  • Quieter roads – By using noise-reducing asphalt mixes and specialised concrete grinding techniques, motorists will be able to travel along the N2 and N3 peacefully with less tyre noise;
  • No more dangerous curves – Apart from resolving chronic traffic congestion through the construction of additional traffic lanes, Sanral said that the upgrading of the N2 and N3 will also result in increased safety. Dangerous curves will be ironed out, while unsafe intersections will be redesigned, it said. Sanral said will also realign parts of then N3 where the steep grades cause major traffic congestion and serious crashes;
  • More robust pavements – More damage is caused to roads by heavy vehicles than light vehicles. To cater for growing volumes of freight traffic on the N2 and N3, Sanral said it will consider pavement design methods and materials to decrease deterioration.considered;
  • Environmentally friendly – During construction on the N2 and N3, Sanral said it will commit to enhancing eco-efficiency and identifying and managing or eliminating environmental risks. This will include planting partnerships in its quest to re-populate the entire road reserve to a similar state it was in before construction. The agency said that during the recent upgrading of the Hammarsdale Interchange, several plant species, including a range of specially protected bulbs and aloes growing along the busy N3, have been translocated to a temporary nursery to save them from being destroyed;
  • Improved spaces for non–motorists – Sanral said that the upgrades are being designed for ‘all users’ including pedestrians, non-motorized road users and local communities and businesses. The safety of motorists and pedestrians alike, will be a central consideration in every decision made about construction, it said.
https://businesstech.co.za/news/motoring/333877/new-upgrades-coming-to-south-africas-busiest-highways/
 

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New upgrades coming to South Africa’s busiest highways

The South African National Roads Agency (Sanral) is currently making a number of upgrades to two of South Africa’s busiest highways – the N2 and N3.

The agency said that it plans to spend R28 billion on improvements to the highways in the coming months – including an increase in the number of lanes, and configuration changes to some of the busiest interchanges.

“As a road authority, Sanral’s primary sphere of influence is engineering. However, the N2 and N3 upgrade programme will allow for the facilitation of an integrated approach to improve safety for all road users,” it said.

“It is not just human factors, such as speeding, not wearing seat-belts or careless driving, that increase the risk of a crash occurring. Poor road design can also cause crashes.”

In addition to the above upgrades, Sanral said that it would also be looking to make the following changes:

  • Quieter roads – By using noise-reducing asphalt mixes and specialised concrete grinding techniques, motorists will be able to travel along the N2 and N3 peacefully with less tyre noise;
  • No more dangerous curves – Apart from resolving chronic traffic congestion through the construction of additional traffic lanes, Sanral said that the upgrading of the N2 and N3 will also result in increased safety. Dangerous curves will be ironed out, while unsafe intersections will be redesigned, it said. Sanral said will also realign parts of then N3 where the steep grades cause major traffic congestion and serious crashes;
  • More robust pavements – More damage is caused to roads by heavy vehicles than light vehicles. To cater for growing volumes of freight traffic on the N2 and N3, Sanral said it will consider pavement design methods and materials to decrease deterioration.considered;
  • Environmentally friendly – During construction on the N2 and N3, Sanral said it will commit to enhancing eco-efficiency and identifying and managing or eliminating environmental risks. This will include planting partnerships in its quest to re-populate the entire road reserve to a similar state it was in before construction. The agency said that during the recent upgrading of the Hammarsdale Interchange, several plant species, including a range of specially protected bulbs and aloes growing along the busy N3, have been translocated to a temporary nursery to save them from being destroyed;
  • Improved spaces for non–motorists – Sanral said that the upgrades are being designed for ‘all users’ including pedestrians, non-motorized road users and local communities and businesses. The safety of motorists and pedestrians alike, will be a central consideration in every decision made about construction, it said.
https://businesstech.co.za/news/motoring/333877/new-upgrades-coming-to-south-africas-busiest-highways/
This part concerns me really....

They need to work on making the pedestrian crossings easier and more numerous yes, but they also need to work on getting pedistrians and non-motorised users etc OFF the damn freeways. They are a hazard...
 
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