contract c1039: n2/borcherds quarry interchange … · 8/11/2016 · n2/borcherds quarry...

CONTRACT C1039:N2/BORCHERDS QUARRY INTERCHANGE AND

RELATED WORKS

SARF SEMINAR 11 AUGUST 2016

Current Spatial Pattern - MSDF

City Of Cape Town CTOD

Project Planning Objectives

Understand the medium to long term land-use and transport infrastructure scenarios for the study area.

Improve N2 access to Philippi Industria.

Improve N2 access to CTIA and adjacent industrial areas (Airport Industria, Airport City)

Improve public transport access on:Proposed IRT corridor along Eisleben/Lansdowne/New Borcherds Quarry.

Extend N2: 3rd lane/BMT lane from Borcherds Quarry Interchange to Mew Way Interchange.

Allow in the infrastructure planning for Airport Beltway Expressway improvements.

Support a consistent road network/hierarchy in the study area.

AIRPORT INDUSTRIA

NYANGA

NEW CROSSROADS

BROWNS FARM

PHOLA PARK

PHILIPPI EAST

DELFT SOUTH

PHILIPPI INDUSTRIA (SOUTH)

PHILIPPI INDUSTRIA (NORTH)

Philippi Freeway Accessibility Existing Situation

ROUTE 1 – R300 access from North and N2 access from EastROUTE 2 – R300 access from WestROUTE 3 – N2 access from West

N2/R300 SWARTKLIP INTERCHANGE

Borcherds Quarry Road

Eisleben Drive

PREVIOUS ROAD/INTERCHANGE LAYOUTS

•New Borcherds Quarry Alignment•Airport Industria

•CTIA Perimeter Road•King David Golf Course Development

Alternative Interchange Layouts

Minimum Ramp Spacing Requirements

RECOMMENDED MINIMUM RAMP TERMINAL SPACING (SANRAL)

Table 7.1 Interchange Spacing in terms of Signage Requirements

Interchange Configuration Minimum ramp spacing in urban areas

Ramp access to access 1300m

Ramp access to system interchange 2100m

System interchange to ramp access 1400m

System interchange to system interchange

2500m

TO CAPE TOWN

N2/R300 SWARTKLIP INTERCHANGE

ALTERNATIVE A-1

LEGENDFreeways

New Arterial/Service/Access Roads

Existing Arterial/Service/Access Roads

MyCiti Busway Lanes

Traffic Signals

Exit ramp to Symphony Way off new extended C-D road leading to N2/R300 eastbound ramp.

3 Signalised intersections (200m spacing) (sub-standard spacing; 540m required)

300m between mergesMeets AASHTO minimum spacing.

N2 – half diamond interchange onto Symphony Way. Indirect N2 access into Philippi Industria via Sheffield Road.

TO CAPE TOWN

ALTERNATIVE A-2

TO SOMERSET WEST

NEW CROSSROADS

LEGENDFreeways



MyCiti Busway Lanes

Traffic Signals

N2 partial trumpet interchange with west facing ramps only, direct N2 access onto extended Stock Road.

ALTERNATIVE A-3Full trumpet interchange with direct N2 access onto extended Stock Road.

TO SOMERSET WEST

TO CAPE TOWN

NEW CROSSROADS

INTERSITE LAND

LEGENDFreeways



MyCiti Busway Lanes

Traffic Signals

ALTERNATIVE A-4Full diamond interchange with direct N2 access onto Stock Road extension.

TO SOMERSET WEST

NEW CROSSROADS

TO CAPE TOWN

Requires CTIA perimeter fence to be set back additional 10-20m

LEGENDFreeways



MyCiti Busway Lanes

Traffic Signals

ALTERNATIVE B-1

TO CAPE TOWN

TO SOMERSET WEST

Minimum infrastructure intervention. Retain existing Borcherds Quarry (BQ) Road Interchange, build extension of New Eisleben Drive over N2 into New Borcherds Quarry (NBQ) with no access to N2. Option to add east facing ramps on NBQ for Airport Precinct.

LEGENDFreeways



MyCiti Busway Lanes

Traffic Signals

ALTERNATIVE B-2

TO CAPE TOWN

TO SOMERSET WEST

Combine existing BQ and NBQ Interchanges as a split Diamond Interchange on N2, option to add east facing ramps on NBQ for Airport Precinct.

LEGENDFreeways



MyCiti Busway Lanes

Traffic Signals

`̀

TO CAPE TOWN

TO SOMERSET WEST

LEGENDFreeways



MyCiti Busway Lanes

Traffic Signals

ALTERNATIVE B-3Combine existing BQ and NBQ Interchanges as a double (B type) Parclo Interchanges with a 500m weave length on N2 between merging and diverging ramps.

TO CAPE TOWN

LEGENDFreeways



MyCiti Busway Lanes

Traffic Signals

ALTERNATIVE B-4Combine existing BQ and NBQ Interchanges with C-D road arrangement – with partial single point diamond arrangement for major N2/Eisleben Drive/NBQ turn movements.

`̀

Note: C-D roads in fill for overpass structure over existing Borcherds Quarry Road

TO SOMERSET WEST

TO CAPE TOWN

LEGENDFreeways



MyCiti Busway Lanes

Traffic Signals

ALTERNATIVE B-5ANew single point diamond interchange on NBQ with only west facing ramps retained at existing BQ interchange. Proposed C-D roads linking two sets of west facing ramps.

`̀ `̀


TO SOMERSET WEST

TO CAPE TOWNLEGEND

Freeways



MyCiti Busway Lanes

Traffic Signals

ALTERNATIVE B-5BNew single point diamond interchange on NBQ with only west facing ramps retained at existing BQ Interchange. No C-D roads proposed.

`̀

TO SOMERSET WEST

TO CAPE TOWN

LEGENDFreeways



MyCiti Busway Lanes

Traffic Signals

ALTERNATIVE B-6ANew diamond interchange on NBQ with only west facing ramps retained at existing BQ Interchange. Proposed C-D roads linking two sets of west facing ramps.


TO SOMERSET WEST

TO CAPE TOWNLEGEND

Freeways



MyCiti Busway Lanes

Traffic Signals

ALTERNATIVE B-6BNew diamond interchange on NBQ with only west facing ramps retained at existing BQ Interchange. No C-D roads proposed.

TO SOMERSET WEST

TO CAPE TOWNLEGEND

Freeways



MyCiti Busway Lanes

Traffic Signals

ALTERNATIVE B-6CNew diamond interchange on NBQ with no west facing ramps retained at existing BQ Interchange. No C-D roads proposed.

TO SOMERSET WEST

Alternative Interchange Layouts

Summary of Successive Ramp Spacings on N2 Freeway

Distance Between Successive Ramps Along N2 Freeway

EB (To Somerset West) WB (To Cape Town)

Design SpacingMinimum Spacing

(SANRAL) Design SpacingMinimum Spacing

(SANRAL)

Alternative 3a

Airport Approach ‐NBQ 1555m 1300m R300 – NBQ 1895m 1400m

NBQ ‐ R300 2855m 2100m NBQ – Airport Approach 2105m 1300m

Alternative 8

Airport Approach – EBQ 830m 1300m R300 – NBQ 1895m 1400m

EBQ – NBQ 830m 1300m NBQ – EBQ 1045m 1300m

NBQ – R300 2855m 2100m EBQ – AirportApproach 1045m 1300m

Nett Total Cost R mil

Nett Total Cost R mil

(excl. VAT); (incl. Contingency and Contractor P&G)

N2 CORRIDOR (PGWC)

ROAD NETWORK (CoCT)

km 17.5 - Mew Way SANRAL

Nett Total Cost (excl. VAT)

Alternative

Interchange Upgrades

Additional 3rd lane on N2 to km 17.5

Subtotal

1 R 263.68 R 96.75 R 360.43 R 219.71 R 82.52 R 662.67

2 R 313.32 R 96.75 R 410.08 R 219.71 R 82.52 R 712.31

3A R 205.49 R 96.75 R 302.25 R 219.71 R 82.52 R 604.483B R 255.14 R 96.75 R 351.89 R 219.71 R 82.52 R 654.13

4* R 413.93 R 96.75 R 510.68 R 247.76 R 82.52 R 840.96

5 R 220.08 R 96.75 R 316.83 R 219.71 R 82.52 R 619.07

7 R 222.19 R 96.75 R 318.95 R 219.71 R 82.52 R 621.18

8 R 210.98 R 96.75 R 307.73 R 219.71 R 82.52 R 609.97

*Measurement Includes C-D Roads and Realignment of the N2

Multi Criteria Evaluation

PROPOSED EVALUATION CRITERIA FOR INTERCHANGE / ROAD NETWORK ALTERNATIVES

Proposed Rating

Description Rating

Excellent 5

Above average 4

Average 3

Below average 2

Poor 1

Multi Criteria Evaluation: Summary of Findings: Weighting Summary

Evaluation Criteria

HHO AFRICA

(ORIGINALWEIGHTING)

CoCT IRT Planning

CoCT SpatialPlanning

HHO AFRICA (EQUAL

WEIGHTING)

Construction CostCost of roads, bridges, services, property acquisition, etc.

20 20 20 16.7

Interchange Planning / Road Network Considerations

Interchange/C-D ramps: spacing requirements

10 10 10 8.3

Road hierarchy 5 5 5 4.2

Intersection spacing 5 5 5 4.2

Network Traffic Performance

Travel time savings and level of service

20 20 10 16.7

PT Services / NMT Network

IRT/ Public transport services 5 7.5 10 8.3

NMT routes across N2 5 7.5 5 8.3

Improved Access and Security

Philippi Industrial & surrounds 15 7.5 15 12.5

CTIA, Airport precincts, etc. 5 7.5 10 4.2

Risk to Implementation

Potential delays due to housing relocation and land acquisition

10 10 10 16.6

Total 100 100 100 100

Multi Criteria Evaluation: Summary of Findings: Score Summary

WeightingAlternative

1 2 3a 3b 4c 5 7 8

HHO AFRICA (ORIGINAL WEIGHTING)

3734

3734

4121

4053

3317

3516

3188

4121

CoCT IRT Planning 3724

3695

4101

4003

3238

3676

3257

4072

CoCT Spatial Planning 3754

3715

4101

4023

3188

3715

3457

4052

HHO AFRICA (EQUAL WEIGHTING) 3654

3605

3991

3893

3237

3486

3198

3972

TOTAL 14854

14735

16311

15963

12958

14376

13077

16212

Preferred Alternative

Land Use Projections & Traffic Modelling

CoCT Pragmatic Densification Scenario (PDS) for 2032 as based Modelled scenario uses PDS as base, plus :

CTIA generated traffic (25 MPA)PEDI "optimistic scenario" (105ha)Portion of Glebe land (76 ha; 70% of 108ha)1% pa background peak hour traffic growth

Future Flows on Alternative 03A Network : AM Peak Hour

Future Flows on Alternative 03A Network : PM Peak Hour

Borcherds Quarry Road – Robert Sobukwe to Airport Approach

New Borcherds Quarry Road – Airport Approach to N2

New Borcherds Quarry Road/N2 Interchange

New Eisleben Drive – N2 to Govan Mbeki

Project Planning Objectives

In conclusion we have met the following objectives:Understood the medium to long term land-use and transport infrastructure scenarios for the study area.Improved N2 access to Philippi Industria and its linkage to the Airport & Airport Industrial Area.Improved N2 access to CTIA and adjacent industrial areas (Airport Industria, Airport City)Improved public transport access on:

Proposed IRT corridor along Eisleben/New Borcherds Quarry, with links to Klipfontein & Wetton-Lansdowne Road CorridorsExtend N2: 3rd lane/BMT lane from Borcherds Quarry Interchange to Mew Way Interchange.NMT infrastructure along the route

Improved NMT accessibility across the N2Allowed in the infrastructure planning for Airport Beltway Expressway improvements.Supported a consistent road network/hierarchy in the study area.“Paving the way” towards the City’s vision of a node at Philippi

• Phase 1: 3rd lane on N2 underway• Remaining Phases: Scheduled for 2018/19

• Finalise detailed design

• Relocation of Steenbras water main

• Relocation of informal housing within road prism

Way Forward

contract c1039: n2/borcherds quarry interchange … · 8/11/2016 · n2/borcherds quarry...

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