Road Maintenance Standards Portfolio Committee on Transport

Transcription

1 Road Maintenance Standards Portfolio Committee on Transport 15 th March 2011 L Kannemeyer

2 Main Road Categories in South Africa National Roads Secondary Roads Tertiary Roads

3 South African Road Network Authority Paved Gravel Total SANRAL 16, ,170 Provinces , , ,816 Metros ,682 14,461 66,143 Municipalities 37, , ,849 Total 153, , ,978 Un-Proclaimed (Estimate) 140, ,000 Estimated Total 153, , ,978 Un-Proclaimed Roads = Public roads not formally maintained by any Authority

4 Houghton Eish!!! How Did This Happen? Sunninghill

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6 Paved Provincial + SANRAL Type Year V-Good Good Fair Poor V-Poor Length ,303 24,220 21,570 8,399 3,766 % % 38.29% 34.10% 13.28% 5.95%

7 Gravel Provincial Type Year V-Good Good Fair Poor V-Poor Length ,981 13,863 35,344 33,219 19,327 % % 13.36% 34.07% 32.02% 18.63%

8 CONDITION SUMMARY Municipalities - Gravel Metros - Gravel Authority Provinces - Gravel Municipalities - Paved Metros - Paved Very Poor (km) Poor (km) Fair (km) Good (km) Very Good (km) Provinces - Paved SANRAL - Paved 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Percentage of Network As they say in the movies Houston we have a problem

9 Estimated Backlog (Strengthening / Regravel) Authority Strengthening/Regravel Backlog: Roads in Poor to Very Poor Condition Paved Gravel Total % Length Cost % Length Cost Length Cost SANRAL 11.86% 1,932 R 15,456,000, % 0 R 0 1,932 R 15,456,000,000 Provinces % 10,980 R 87,840,000, % 69,216 R 13,843,111,157 80,196 R 101,683,111,157 Metros % 2,127 R 10,635,000, % 1,227 R 245,315,473 3,354 R 10,880,315,473 Municipalities 3.62% 1,363 R 4,089,000, % 86,245 R 17,249,009,106 87,608 R 21,338,009,106 Total Backlog 16,402 R 118,020,000, ,687 R 31,337,435, ,089 R 149,357,435,736 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.

10 Budget Requirement versus Allocation Estimated Maintenance Budget Requirement per Year Maintenance Budget Per Year Authority Total Network Sustain Backlog Total 2010/11 Allocation 2010/11 As % SANRAL 16,170 R 9,248,616,000 R 3,091,200,000 R 12,339,816,000 R 6,844,501, % Provinces ,816 R 29,533,341,758 R 12,046,129,680 R 41,579,471,438 R 22,300,000, % Metros ,143 R 13,086,160,700 R 347,052,528 R 13,433,213,228 R 3,700,000, % Municipalities 339,849 R 14,037,274,500 R 389,727,300 R 14,427,001, % Totals km 606,978 R 65,905,392,957 R 15,874,109,508 R 81,779,502,465 R 32,844,501, % 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.

11 Road Condition Why is it Happening Pavement Design? Road Deterioration due to Traffic Loading & Environment Maintenance Actions Good Fair Poor No Maintenance Very Poor (Typically Designed for Traffic Expected over Years) Year Moisture Ingress SA Pavement Design Requires Performance of Preventative Maintenance

12 Why is it Happening Pavement Design? Increased Number of Heavy Axles Repetitions over year Design Life South Africa Waterproof Layer Northern Hemisphere Local Street Farm To Market Typical National / Interstate Road

13 Why is it Happening Pavement Age Pavement Age Trend 100% 90% National Road Network Length (Carriageway km) 80% 70% 60% 50% 40% 30% 20% 10% 0% YEAR > 25 years years years years 6-10 years 0-5 years Please Note: 80% of Network Older than Original 20 Year Design Life

14 Where is it Happening Rainfall Zones FRANCISTOWN CHIPINGE BEIRA WINDHOEK MESSINA WALVISBAY GABORONE TZANEEN KEETMANSHOOP ZEERUST PRETORIA JOHANNESBURG KLERKSDORP VOLKSRUST MAPUTO BLOEMFONTEIN LADYSMITH WEPENER ROUXVILLE DURBAN PORT SHEPSTONE CAPE TOWN CERES OUDTSHOORN SOMERSET WEST MOSSEL BAY PORT ELIZABETH EAST LONDON Wet (>1000 mm/yr) Moderate ( ) Dry (< 500 mm/yr)

15 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

16 What Is The Solution Automatic Pothole Patching? Nooooooo. Potholes are the symptom not the cause If we strive to become best pothole repairers in the world.. Then we have lost the plot...

17 What Is The Solution Preventative Maintenance! SANRAL Routine Maintenance Cost - Crack Sealing, Cleaning Drainage Structures, Cutting of Grass - R 4.50 m 2 / per km / year SANRAL Reseal Cost - R70 R130 m 2 / 10 year SANRAL Pothole Repair Cost -R 700 R1500 / m 2 -SANRAL In-situ Recycle -R 250 R500 / m 2

18 How Do SANRAL Implement This? Technical Specifications (Legal Words)

19 How Do SANRAL Implement This? Technical Specifications (Legal Words)

20 How Do SANRAL Implement This? Routine Road Maintenance Manual (Pictures)

21 How Do SANRAL Implement This?

22 How Do SANRAL Implement This? Routine Road Maintenance Guidance Manual (Pictures)

23 How Do SANRAL Implement This?

24 How Do SANRAL Implement This?

25 Conclusion? Road Network Problems Solution Old Network - >80% older than original 20 year design life NO Preventative Maintenance done by most authorities (R4.50 m 2 / km / year) waiting for potholes. If current budget allocations are only going to be spent on pothole repairs (R700 R1500 m 2 ) then totally insufficient to sustain the network. 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.

26 SANRAL Website: THANK YOU! Where a road passes, development follows right on its heels