Based on the BP neural network, this paper sets up the model of cost estimation of highway engineering. The BP neural network model is trained by a sample data obtained from some performed typical engineering to come true quick cost-estimating ． It is sure that the method is practical and the estimating results are reliable according to lots of examples ． It shows the promising perspective of BP Neural Network in cost estimate of construction engineering .
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Wang et al. (2010) studied this question.
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