With the rapid development of urban rail transit (URT), the ambiguous lifespan of ex post evaluation projects is in great need of change. This paper defines the lifespan of ex post evaluation and reviews the existing literatures and some foreign practices. Additionally, combining the characteristics of URT projects in China and some relevant references on ex post evaluation, we put forward several suggestions with regard to the lifespan of URT ex post evaluation determination as well as a proposal for the trail implementation lifespan.
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