Cost Estimating

• GAO Cost Estimating and Assessment Guide, Best Practices for Developing and Managing Capital Program Costs, March 2009 (.pdf) 
• NHI Training for Addressing Uncertainty in Cost Estimating
• "Cost and Oversight of Major Highway and Bridge Projects - Issues and Options" General Accounting Office, May 8, 2003 (pdf, 0.7 mb)
• "Underestimating Costs in Public Works Projects" Bent Flyvbjerg, Mette Skamris Holm, and Søren Buhl, Journal of the American Planning Association, Volume 68, Number 3, Summer 2002 (pdf, 0.5 mb)