Road Maintenance Standards · potholes – with associated systematic repair of existing potholes....
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Road Maintenance Standards Portfolio Committee on Transport Portfolio Committee on Transport 15 15 th th March March 20 20 11 11 L Kannemeyer L Kannemeyer
Transcript of Road Maintenance Standards · potholes – with associated systematic repair of existing potholes....
Road Maintenance Standards
Portfolio Committee on TransportPortfolio Committee on Transport
1515thth March March 20201111L KannemeyerL Kannemeyer
National RoadsSecondary RoadsTertiary Roads
Main Road Categories in South AfricaMain Road Categories in South Africa
South African Road Network
Un-Proclaimed Roads = Public roads not formally maintained by any Authority
Authority Paved Gravel Total
SANRAL 16,170 0 16,170
Provinces - 9 48,176 136,640 184,816
Metros - 9 51,682 14,461 66,143
Municipalities 37,691 302,158 339,849
Total 153,719 453,259 606,978
Un-Proclaimed (Estimate) 140,000 140,000
Estimated Total 153,719 593,259 746,978
SunninghillSunninghill
HoughtonHoughton
Eish !!!How Did This Happen ?
Paved Paved –– Provincial + SANRALProvincial + SANRAL
Type Year V-Good Good Fair Poor V-PoorLength 2004-08 5,303 24,220 21,570 8,399 3,766
% 2004-08 8.38% 38.29% 34.10% 13.28% 5.95%
Gravel Gravel –– ProvincialProvincial
Type Year V-Good Good Fair Poor V-PoorLength 2004-08 1,981 13,863 35,344 33,219 19,327
% 2004-08 1.91% 13.36% 34.07% 32.02% 18.63%
CONDITION SUMMARYCONDITION SUMMARY
0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100%
SANRAL - Paved
Provinces - Paved
Metros - Paved
Municipalities - Paved
Provinces - Gravel
Metros - Gravel
Municipalities - GravelAu
thor
ity
Percentage of Network
Very Poor (km)Poor (km)Fair (km)Good (km)Very Good (km)
As they say in the movies – “Houston we have a problem”
Estimated Backlog (Strengthening / Regravel)Estimated Backlog (Strengthening / Regravel)
% Length Cost % Length Cost Length CostSANRAL 11.86% 1,932 R 15,456,000,000 0.00% 0 R 0 1,932 R 15,456,000,000Provinces - 9 22.79% 10,980 R 87,840,000,000 50.66% 69,216 R 13,843,111,157 80,196 R 101,683,111,157Metros - 9 4.12% 2,127 R 10,635,000,000 8.48% 1,227 R 245,315,473 3,354 R 10,880,315,473Municipalities 3.62% 1,363 R 4,089,000,000 28.54% 86,245 R 17,249,009,106 87,608 R 21,338,009,106
Total Backlog 16,402 R 118,020,000,000 156,687 R 31,337,435,736 173,089 R 149,357,435,736
Strengthening/Regravel Backlog: Roads in Poor to Very Poor Condition
Authority TotalGravelPaved
Notes:1.Based on actual condition data for only 37% of the network (used as estimate for rest ???) and some data as old as 2004 for some authorities.2.The above backlog excludes backlogs related to periodic resurfacing of the network, upgrade of gravel roads to surfaced standard, addition of additional lanes to alleviate congestion and construction of new roads.
Budget Requirement versus AllocationBudget Requirement versus Allocation
Notes:1.Based on actual condition data for only 37% of the network (used as estimate for rest ???) and some data as old as 2004 for some authorities.2.Strengthening Backlog addressed over 5 years, and regravel over 10years.3.The above backlog excludes backlogs related addition of additional lanes to alleviate congestion and construction of new roads.
Sustain Backlog Total
SANRAL 16,170 R 9,248,616,000 R 3,091,200,000 R 12,339,816,000 R 6,844,501,000 55.47%
Provinces - 9 184,816 R 29,533,341,758 R 12,046,129,680 R 41,579,471,438 R 22,300,000,000 53.63%
Metros - 9 66,143 R 13,086,160,700 R 347,052,528 R 13,433,213,228 R 3,700,000,000 27.54%Municipalities 339,849 R 14,037,274,500 R 389,727,300 R 14,427,001,800 0.00%Totals km 606,978 R 65,905,392,957 R 15,874,109,508 R 81,779,502,465 R 32,844,501,000 40.16%
2010/11 Allocation
2010/11 As %
Estimated Maintenance Budget Requirement per Year
Authority Total Network Maintenance Budget Per Year
Why is it Happening Why is it Happening –– Pavement Design ?Pavement Design ?
0
20
40
60
80
100
2008 2013 2018 2023 2028Year
Roa
d C
ondi
tion Good
Fair
Poor
Very Poor
Maintenance Actions
No Maintenance
Moisture Ingress
(Typically Designed for Traffic Expected over 20-30 Years)
Road Deterioration due to Traffic Loading & Environment
SA Pavement Design Requires Performance of Preventative Maintenance
Northern Hemisphere
Waterproof Layer
Local Street
Farm To Market
Typical National / Interstate Road
Increased Number of Heavy Axles Repetitions over 20-30 year Design
Life
South Africa
Why is it Happening Why is it Happening –– Pavement Design ?Pavement Design ?
Why is it Happening Why is it Happening –– Pavement AgePavement Age
Please Note: 80% of Network Older than Original 20 Year Design Life
Pavement Age Trend
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
YEAR
Nat
iona
l Roa
d N
etw
ork
Leng
th
(Car
riage
way
km
)
> 25 years 21 - 25 years 16 - 20 years 11 - 15 years 6 - 10 years 0 - 5 years
PORT SHEPSTONE
CHIPINGE
DURBAN
BEIRA
FRANCISTOWN
GABORONE
WINDHOEK
WALVISBAY
KEETMANSHOOP
BLOEMFONTEIN
ROUXVILLE
WEPENER
KLERKSDORP
ZEERUSTJOHANNESBURG
MAPUTO
LADYSMITH
VOLKSRUST
EAST LONDON
PORT ELIZABETHMOSSEL BAY
OUDTSHOORN
CERES
CAPE TOWN
MESSINA
TZANEEN
SOMERSETWEST
PRETORIA
Wet (>1000 mm/yr)
Moderate (500 – 1000)
Dry (< 500 mm/yr)
Where is it Happening Where is it Happening –– Rainfall ZonesRainfall Zones
Birth/Rebirth of a Pothole ?
New Road - Deterioration over time due to Traffic Loading &
Environment
NO Preventative Maintenance- Crack Sealing- Cleaning Drainage Structures- Cutting of Grass
What Is The Solution What Is The Solution –– Automatic Pothole Patching? Automatic Pothole Patching?
NoooooooNooooooo……..Potholes are the symptom Potholes are the symptom
not the causenot the cause……If we strive to become If we strive to become best pothole repairers in best pothole repairers in
the world .. Then we the world .. Then we have lost the plot ...have lost the plot ...
What Is The Solution What Is The Solution –– Preventative Maintenance ! Preventative Maintenance !
SANRAL Routine Maintenance Cost- Crack Sealing, Cleaning Drainage Structures, Cutting of Grass- R 4.50 m2 / per km / year
SANRAL Reseal Cost- R70 – R130 m2 / 10 year
SANRAL Pothole Repair Cost-R 700 – R1500 / m2
-SANRAL In-situ Recycle -R 250 – R500 / m2
How Do SANRAL Implement This ?How Do SANRAL Implement This ?
Technical Specifications (Legal Words)
How Do SANRAL Implement This ?How Do SANRAL Implement This ?
Technical Specifications (Legal Words)
How Do SANRAL Implement This ?How Do SANRAL Implement This ?
Routine Road Maintenance Manual (Pictures)
How Do SANRAL Implement This ?How Do SANRAL Implement This ?
How Do SANRAL Implement This ?How Do SANRAL Implement This ?
Routine Road Maintenance Guidance Manual (Pictures)
How Do SANRAL Implement This ?How Do SANRAL Implement This ?
How Do SANRAL Implement This ?How Do SANRAL Implement This ?
Conclusion?
• Road Network Problems• Old Network - >80% older than original 20 year design life• NO Preventative Maintenance done by most authorities (R4.50 m2 / km /
year) – waiting for potholes.• If current budget allocations are only going to be spent on pothole repairs
(R700 – R1500 m2) then totally insufficient to sustain the network.
• Solution• Must ensure adequate focus on preventative maintenance to prevent new
potholes – with associated systematic repair of existing potholes.• All the guidelines manuals are available.• Officials not always aware of existence or how to apply - Need to ensure
that appropriate technical skills are available at all government levels.
SANRAL Website: www.nra.co.zaSANRAL Website: www.nra.co.za
““Where a road Where a road passes, passes,
development development follows right on its follows right on its
heelsheels””
THANK YOU!THANK YOU!THANK YOU!
