ROADS PROVISION ROADS PROVISION DEPARTMENTDEPARTMENT

Pavement Pavement ManagementManagement

Durban Road Network Durban Road Network OwnershipOwnership

Primary Road Owners

• eThekwini Municipality

• KZN DoT

• SANRAL

MA RG ARE T M

N CA DI AV E

Road NetworkSANRALKZNeTHEKWINI

LEGEND N

EW

S

eThekwini Road Network eThekwini Road Network StatisticsStatistics

RISFSA

Category

Road Lengt

h(km)

Road Lengt

h(km) PMS

Category

Road Length(km)

Road Lengt

h(km)

Total Road Length (km)Surfac

ed Gravel Surfaced Gravel

2 117 0 A 117 0 1173 359 0 B 1 343 0 1 3434 2 259 0 C 1 275 0 1 2755 3 192 1 052 D 3 192 1 052 4 244

Total 5 927 1 052 Total 5 927 1 052 6 979

eThekwini Road Network eThekwini Road Network ManagementManagement

New Surfaced Roads

PrivateDevelopmentHousing

Pavement Design Report Materials As Built Letter of Compliance

Existing SurfacedRoad Network

RoadRehabilitation

Des

ign

&Co

nstru

ctio

n

Pavement ManagementSystem

Dat

aCa

ptur

e

RoutineMaintenance

NetworkRehabilitationProgramme

Prioritization &Optimization

Capital Roads

Gravel RoadNetwork

Rout

ine &

Plan

ned

Main

tena

nce

Des

ign

&Co

nstru

ctio

n

New Surfaced Roads

PrivateDevelopmentHousing

Handover to Roads Provision Pavement Design Report Materials As Built Letter of Compliance

Existing SurfacedRoad Network

RoadRehabilitation

Des

ign

&Co

nstru

ctio

n

Road &StormwaterMaintenance

Pavement ManagementSystem

Dat

aCa

ptur

e

NetworkRehabilitationProgramme

Prioritization &Optimization

Capital Roads

Gravel RoadNetwork

Des

ign

&Co

nstru

ctio

n

Des

ign

&Co

nstru

ctio

n

Des

ign

&Co

nstru

ctio

n

0102030405060708090

100

2003 2005 2007 2009Year of Assessment

Aver

age R

oad

Net

work

Visu

al Co

nditi

on In

dex

VeryPoor

Poor

Fair

VeryGood

Good

eThekwini Surfaced Road eThekwini Surfaced Road Condition TrendsCondition Trends

eThekwini

SANRAL

KZNDoT

PMS Road CategoriesOveral

lA B C D

79.5 81.2 80.2 79.8 80.3 85.3 73.5

Durban Average Surfaced Road Durban Average Surfaced Road Condition 2009Condition 2009

Road Rehabilitation Budget Road Rehabilitation Budget AllocationAllocation

050

100150200250300350400

2004/ 05 2005/ 06 2006/ 07 2007/ 08 2008/ 09 2009/ 10 2010/ 11

Financial Year

Budg

et A

lloca

tion

(R M

illio

n)

2009 Visual Condition 2009 Visual Condition Assessment OutcomesAssessment Outcomes

Length (km) of network - VCI < 30 7.3

Length (km) of category A & B roads - VCI < 50 24.8

% of category C & D roads - VCI < 50 4.7

Average VCI for entire network 80.3

ConstraintsConstraints• All roads Visual Condition Index (VCI) > 30All roads Visual Condition Index (VCI) > 30• All category A & B roads VCI > 50All category A & B roads VCI > 50• < 10% category C & D roads VCI < 50< 10% category C & D roads VCI < 50• Average VCI of entire network > 70Average VCI of entire network > 70

OutcomesOutcomes

Consequential Road Life-Consequential Road Life-spansspans

PMS Category A B C and D

Total Rehab. (% Length of Category) 3.1 4.9 2.7

Years Between Rehab. Treatments 32 21 37

Standard Design Lifespan (Years) 30 20 20

Challenges …. 1Challenges …. 1

Condition Assessment• Based on Visual Condition Index (TRH 22)

• Subjective

•Quality and significance of data

• Excessive data captured for minor roads (75% of network)

•Slow assessment rate

• Mechanical testing preferable

•Generates large quantities of data

Challenges …. 2Challenges …. 2

Network Level versus Project Level Analysis• 60% conversion rate (by project)

• Optimisation on greatest benefit/cost - not area

• Analysis based on links (intersection to intersection)

Network Variability• Ad hoc development (intersection

improvements, widenings, etc.)

• No “As Built” records

Challenges …. 3Challenges …. 3

GIS Issues• Corporate GIS Co-ordination

• Subservient to Property Management System

• Asset identifier (Road ID) not “owned” by Roads Provision Department

Accounting Issues• Legislated register (MFMA) on

accounting system (JD Edwards)

• Separate database from GIS & PMS

Challenges …. 4Challenges …. 4

Skills Shortages• Highly specialised field

• Few practitioners country wide

• Roads Provision staff :-

1 Technologist

1 Technician (no experience)

1 GIS officer

Thank You