OPEN ACCESS
Although the urge to construct new gravel roads to reach areas, which are potential economically is still there, it is now becoming clear to the road agencies in sub-Saharan Africa that a large proportion of the gravel roads constructed or rehabilitated between 2005 and 2008 years are no longer economical. These roads have reached their terminal stage due to various reasons, ranging from improper monitoring and maintenance needs assess-ment to challenges of getting the required funds for gravel roads conservation.
Based on the above challenges, the sub-Sahara African countries, including Tanzania, are unceasingly searching for ways to strengthen the management of existing gravel roads network as part of roads transport infrastructure.
To accomplish the above demand, Tanzania has two organisations concerned with managing its gravel road networks, namely Tanzania Road Agency (TANROADS) and Local Government Authority (LGA)’s District Engineer’s office. Each one of these two organisations uses its own road management system. TANROADS uses Road Maintenance Management Systems, and LGA uses District Roads Management Systems.
These two systems have been developed through foreign aid in terms of experts and financial assistance with minimal participation of local experts.
This paper focuses on factors affecting the efficiency and effectiveness of these management systems in gravel roads monitoring and maintenance needs assessment in comparison with those in developed countries. The authors expect that by highlighting those elements affecting the provision of accurate gravel roads inven-tory and road condition data will improve further the diagnosis of distresses influencing the performance of gravel roads, and come up with proper remedy to suit the local condition.
Conservation, effective, gravel roads, infrastructure, inventory, monitoring, needs assessment, performance, road condition survey, road mentor
[1] Government of Switzerland, Swiss Development Cooperation, SDC, and Government of the United Republic of Tanzania, Ministry of Works, Communication and Transports. Road Monitoring and Maintenance Need Assessment for Maintenance Management of Paved Trunk Roads. Report developed for Morogoro Roads Support Project. ITECO, Affolterna/Albis, 1993.
[2] Mwaipungu, R.R. & Allopi, D., Review of sub-Saharan African gravel roads management systems: Tanzanian case study. Proc. of the 18th Int. Conf. On Urban Transport and the Environment in the 21st Century, eds. J.W.S. Longhurst & C.A. Brebbia, La Coruna: Spain, pp. 629–640, 2012.
[3] Robinson, R., Danielson, U. & Snath, M., Road Maintenance Management Concepts and Systems, The University of Birmingham and the Swedish National Road Administration, MacMillan Press Ltd: London, Great Britain, p. 78, 1998.
[4] Paige-Green, P. & Visser, A.T., Comparison of the impact of various unpaved road performance models on management decisions. Proc. of the 5th Int. Conf. on Low-Volume Roads, Raleigh North Carolina, Transportation Research Record No. 1291, Vol. 2, pp. 137–1442, 1991.
[5] Technical Recommendation for Highways - 22 (Draft). Pavement Management System. Committee of State Road Authorities, Pretoria, South Africa, 1994.
[6] Audit Commission for Local Authorities in England and Wales, Improving Highways Mainte-nance; A Management Handbook. Her Majesty Stationery Office: London, 1988.
[7] Oliver, J.E., Basic road maintenance operations (Chapter 17). Topics in Highways; the Location, Design, Construction and Maintenance of Road Pavements, ed. C.A. O’Flaherty, Butterworth-Heinemann: Oxford, UK, pp. 452–477, 2002.
[8] Underwood, Robin. T., Road Engineering Practice, MacMillan Education Australia PTY Ltd: Australia, pp. 465–470, 1995.
[9] Prime Minister’s Office Regional Administration and Local Government, United Republic of Tanzania (PMO-RALG), Annual district road inventory and condition survey and District road management system, 2004.
[10] Schliessler, A. & Alberto B., Roads; A new Approach for Road Network Management and Conservation. United Nations Economic Commission for Latin America and Caribbean, Larrea Diseñadores e Impresores: Santiago, Chile, p. 48, 1993.
[11] Organisation for Economic Co-operation and Development, Road Transport Research. Road Monitoring for Maintenance Management, Volume 1: Manual for developing countries: volume 2: Damage catalogue, OECD in co-operation with the World Bank: Paris, pp. 8–10, 1990.
[12] Shahin, M.Y., Pavement Management for Airports, Roads and Parking Lots, Chapman & Hall: New York and London, pp. 7–27 & 112–223, 1994.
[13] TANROADS 3rd Quarter Progress Report 2009/2010 and PMO-RALG’s Operational Plan for 2010/2011.
[14] Katula, J. & Toole, T., Road management system-the development of the road mentor system in Tanzania. Proc. of Annual Roads Convention, Dar es Salaam, Tanzania 2000.
[15] Tanzania National Roads Agency, Road Maintenance Management System (RMMS), Data Collection Manual Inventory and Condition Data-Road Mentor Data Collection Manual. Version 5. P. 3, 2010.
[16] Ngoiya, F.E., Roads infrastructure provision: a key to economic growth and achievement of millennium development goals in Tanzania. Proc. of the 6th Int. Conf. on the Role of Engineers in Meeting Millennium Development Goals in Lesser Economics, Arusha, Institution of Engineers Tanzania, pp. 45–48, 2008.
[17] Mwaipungu, R.R. & Allopi, D., The appropriate material specification and manual is a key for effective gravel road design, construction and maintenance practice. Proc. of the 1st National Conf. On Intermodal Transportation: Problems, Practices and Policies. Hampton University: Hampton, VA 23668 USA, pp. 176–188, 2012.
[18] Hamm, Ag., Compaction in Asphalt Construction and Earthworks. Tirschenreuth: Germany, pp. 18–19 & 64–65, 2008.