estimates used to decide whether important transportation infrastructure should be built can mislead grossly and systematically.

Cost overrun is distinguished from cost escalation, which is an anticipated growth in a budgeted cost due to factors such as inflation.

Causes

A 2014 essay by Dominic Ahiaga-Dagbui and Simon Smith suggests an alternative to what is traditionally seen as an overrun in the construction field. They attempt to make a distinction between the often conflated

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