SEACAP 003 LVRR STANDARDS Mainstreaming Appropriate LVRR Standard Local Standards and LVRR Design Specifications Classification Specifications Sealed Macadam VI & Developing a Strategy for Gravel VII MCTPC Research Capacity Concrete VIII etc TRL Ltd Commentary/Guidance Documents In Association with LTEC and Intech Associates 1 2 Contributions to Road Deterioration PROJECT COMPONENT 1 SEACAP 3 Mainstream Appropriate Local Road Technical Standards Structure 100 Percentage contribution Traffic % Contribution TASK GROUP I TASK GROUP II 80 Develop Standards and Develop a Relevant Training Specifications Program Low Volume 60 PROJECT COMPONENT 2 Develop an Affordable and Sustainable Rural Strategy for Attaining the Necessary 40 Research Capacity Roads Environment TASK GROUP III 20 Develop an Appropriate % Contribution Research Capability 0 PROJECT COMPONENT 3 0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 Disseminate the Project Outcomes at the National, Sub-Regional, and International Levels. Traffic (mesa) TASK GROUP IV Initiate Dissemination 3 4 1 SEACAP 3 Progress Meeting May 2007
TASK GROUP I Situation Review Develop Standards and Specifications Documents reviewed (100+): Including National, Regional and International Module 1 Review Current Situation sources on: � Rural road standards (Classifications) Module 2 � Low volume road specifications Research to fill knowledge gaps � Road design guidelines/manuals Module 3 Draft Technical Standards Module 4 Finalise Technical Standards 5 6 Summary Tables -1 Summary Tables -2 Classification Source Classifications Traffic Terrain Roadway Design Speed Vertical Specification Vietnam Cambodia Lao PDR Kenya India Thailand Australia South Africa Function Width (m) (km/h) Gradient % Earthwork and gravel C T C C C C C C India pavement layer Vietnam Bituminous T C C C C C emulsion-surface dressing Cambodia chip seal World Bank Bituminous emulsion-sand T T T C seal SADC Otta seals T T C Gravel sub-base/base T T C C C C Australia Lime stabilized T C C C C C USA sub-base/base Thailand C: Mainstream Construction ORN 6 Lao PDR (Current) T: Trial 7 8 2 SEACAP 3 Progress Meeting May 2007
Classification: Three Key Points General Classifications � Compatible with Lao PDR Road Law Predominantly 2-wheeled traffic; very low volume 1. of light 4 wheel vehicles. � Based firmly on the road function NOT Low volume mix of 4 wheel and 2 wheel vehicles. 2. administration No heavy vehicles Low volume 4 and 2 wheel traffic. Occasional 3. heavy vehicle � Falling within the Low Volume Rural Road Predominantly low volume 4 and 2 wheel traffic. traffic envelope 4. Significant risk of heavy vehicle traffic 9 10 Road Environment: Knowledge Acquisition Rural Road Classes Natural factors Imposed factors � Climate/rainfall � Materials selection VI VII VIII � Hydrology � Traffic mix ADT 51-100 21-50 <20 � Terrain � Axle loads Lane 1 1 1 � Materials availability � Construction regime Carriageway (m) 3.50 3.00 2.50 � Sub-grade � Maintenance regime Shoulder (m) 1.25-1.50 0.75-1.25 0.25-0.75 Formation Width (m) 6.00-6.50 4.50-5.50 3.00-4.00 Socio-economic factors PLUS:- Axle Load Limit Sub-divisions � Whole-life costing � Health and safety 2.5, 6.0 Tonnes � Local Employment � Local Economy 11 12 3 SEACAP 3 Progress Meeting May 2007
PRoMMs Database Rainfall Data from DMH We have used the PRoMMs database of maintainable roads to analyse data on: Road widths Drainage Traffic Surfacing Type Terrain Surface Condition 13 14 Terrain Rural Road Traffic (SweRoad) Broad divisions currently in use 70 60 Flat 50 % of Total 40 LVRR Rolling Hills 30 20 Mountainous 10 Likely to have a modifying effect on 0 road geometry; eg 1 2 3 4 5 Traffic Class Reduced standard in Mountainous Bokeo Champasak Terrain 15 16 4 SEACAP 3 Progress Meeting May 2007
Matrix Based on Terrain Sub-Units & Gradient Road Cross Sections (To Be Developed) Gradient (%) Matrix of Possible <1 Pavement, Earthwork & 1-3 Drainage Options 3-6 Detail Modified by other 6-9 Road Environment Terrain-Road Interaction Factors >9 17 18 THE ROAD ENVIRONMENT PREVAILING PREVAILING CLIMATE HYDROLOGY CLIMATE HYDROLOGY AVAILABLE AVAILABLE MATERIALS MATERIALS TERRAIN TERRAIN OPTIMUM OR GEOLOGY GEOLOGY APPROPRIATE PAVEMENT TRAFFIC TRAFFIC SUB-GRADE SUB-GRADE AXLE LOADS AXLE LOADS DESIGN CONDITIONS CONDITIONS Overlay of road environment factors to arrive at, for example THE “ GREEN ” CONSTRUCTION THE “ GREEN ” CONSTRUCTION an economically viable spot ENVIRONMENT REGIME ENVIRONMENT REGIME improvement design solution MAINTENANCE using appropriate specifications MAINTENANCE REGIME REGIME linked to suitable road 19 20 classification 5 SEACAP 3 Progress Meeting May 2007
Appropriate Specifications LVRR Specifications: Review and Assessment Appropriate to the road function Existing Existing Regional National Specifications Appropriate to available materials Specifications SEACAP 1 & 8 29 No. LVRR Specifications must to be realistic and Standard Specifications achievable – otherwise they are pointless Existing Existing National Trial International Specifications Specifications SEACAP 17 ARRB, IRC. 7 No. 21 22 TASK GROUP III MCTPC Road Research Activity Develop an Appropriate Research Capability Currently little or no research activity or capacity within DoR – previously research Module 8 has been undertaken through the Gaps in Research Capacity Identified Planning and Technical Division (PTD). There is however both a need for a Module 9 sustainable research capability and an Strategy for strengthening research capacity expressed wish at ministerial level. Module 10 Adoption of the Strategy by the MCTPC 23 24 6 SEACAP 3 Progress Meeting May 2007
Outline Structure Principal Research Resources DoR (PTD) NUoL (Civil Eng) STEERING COMMITTEE � Administration � Methodologies Lead by MCTPC, with NUoL. Identifies research issues; identifies funding; liaison with Donors . � Strategy � Staff experience � Mainstreaming � Equipment/Labs RESEARCH MANAGEMENT UNIT � Student manpower DoR (PTD ): Commissions research contracts; monitors progress; applies and mainstreams outputs . DCTPCs RESEARCH GROUPS � Local knowledge NUoL(Civil Eng) Leads research teams; undertakes research � Manpower projects; supplies key specialist input; reports research outcomes to the Research Management Unit. DCTPCs : Local field support 25 26 Outline Strategy SEACAP 3: Programme Basic Structure Agreed (Temporary Basis) 2007 2008 . Feb Mar Apr May Jun Jly Aug Sep Oct Nov Dec Jan Trial projects identified and initiated under Project Months Modules 1 2 3 4 5 6 7 8 9 10 11 12 proposed structure. For example SRSs: Mob 1 2 � Performance of locally adopted sealing options on 3 4 laterite gravel 5 6 � Unsealed road performance in Lao PDR 7 8 � LVRR traffic patterns in Lao PDR . 9 10 11 Review structure (modify if required) and formally adopt . 27 28 7 SEACAP 3 Progress Meeting May 2007
Recommend
More recommend
