Cost diviation in road construction projects: The case of Palestine

Ibrahim Mahamid, Amund Bruland


This paper investigates the statistical relationship between actual and estimated cost of road construction projects using data from road construction projects awarded in the West Bank in Palestine over the years 2004–2008. The study is based on a sample of 169 road construction projects. Based on this data, regression models are developed. The findings reveal that 100% of projects suffer from cost diverge, it is found that 76% of projects have cost under estimation while 24% have cost over estimation. The discrepancy between estimated and actual cost has an average of 14.6%, ranging from -39% to 98%. The relation between the project size (length and width) and the cost diverge is discussed.


cost; diverge; road construction; over estimation; under estimation; overrun.

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Al-Khaldi, Z. (1990) Factors Affecting the Accuracy of Construction Costs Estimating in Saudi Arabia. Master thesis, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia

Al-Momani, A. (1996) 'Construction cost prediction for public school buildings in Jordan', Construction Management and Economics, 14, 311-317,

Al-Zarooni, S. and Abdou, A. (2000) 'Risk management in pre-design stage and its potential benefits for UAE public projects', Proceedings of the 28th World Congress on Housing Challenges for the 21st Century, 15-19 April, Abu Dhabi, UAE

Amehl, O., Soyingbe, A. and Odusami, K. (2010) 'Significant factors causing cost overruns in telecommunication projects in Nigeria', Journal of Construction in Developing Countries, 15

Battaineh, H. (1999) Information system of progress evaluation of public projects in Jordan. Master thesis, Civil Engineering Dept., Jordan Univ. of Science and Technology, Irbid, Jordan

Flyvbjerg, B., Holm, M., and Buhl, S. (2003) 'Underestimating costs in public works projects, error or lie', Journal of the American Planning Association, 68 (3), 279-292,

Jahren, C. and Ashe, A. (1990) 'Predictors of Cost-Overrun Rates', Journal of Construction Engineering and Management, 116 (3)

Mahamid, I. (2011) 'Analysis of Cost Deviations in Road Construction Activities: A Case Study from Palestine', Jordan Journal of Civil Engineering, 5 (4).

MAP (2002) Survey of the Construction Services Industry. Unpublished mission report. The West Bank and Gaza

Nega, F. (2008) Causes and effects of cost overrun on public building construction projects in Ethiopia. Master thesis, Addis Ababa University, Addis Ababa, Ethiopia

Odeck, J. (2004) 'Cost overruns in road constructionâwhat are their sizes and determinants?', Transport Policy, 11, 43â53,

Omoregie, A and Radford, D. (2006) 'Infrastructure delays and cost escalation: causes and effects in Nigeria', Proceeding of sixth international postgraduate research conference, Delft University of Technology and TNO, 3-7 April, the Netherlands

Palestinian Economic Council for Development and Reconstruction (PECDAR), Personal communication, August, 2009. Ramallah, the West Bank, Palestine

Pickrell, D. (1990) Urban rail transit projects: forecasts versus actual ridership and cost. US Department of Transportation, Washington DC

Randolph, D., Rajandra, K., and Campfield, J. (1987) 'Using Risk Management Techniques to Control Construction Contract Costs', Journal of construction engineering and Management, 3 (4), 314-324

Rowland, H. (1981) The causes and effects of change orders on the construction process. Master thesis presented to the Georgia Institute of Technology, at Atlanta, Georgia, USA.

Skamris, M. and Flyvbjerg, B. (1996) 'Accuracy of traffic forecasts and cost estimates on large transportation projects', Transportation Research Record, p. 1518

Sodikov, Jamshid (2005) 'Cost Estimation of Highway Projects in Developing Country: Artificial Neural Network Approach', Journal of the Eastern Asia Society for Transportation Studies, 6, 1036 â 1047

Wilmot, C. and Cheng, G. (2003) 'Estimating Future Highway Construction Costs', Journal Construction Engineering and Management, 129 (3), 272-279, & quot;

UNRWA (2006) Projects completion reports, UNRWA, Gaza