The negative impacts of expressway construction projects (ECPs) on ecosystems have raised serious concerns globally. While ECP contractors are selective in implementing sustainable construction, they have rarely been informed of making reasonable efforts to address the concerns. This study aims to map out a quantitative analysis approach to aid contractors in determining ecological protection efforts. Four latent variables are included: project features, project perceptions, ecological impact evaluation, and ecological protection decision-making. It is revealed that project perceptions serve as a foundation for effort determination. The determination is built on the relationship between ecological impacts and the intensity of construction activities. Furthermore, the main effort decision is resource consumption. This study addresses decision-making issues pertained to the uptake of sustainability principles in the ECP sector and contributes a three-step framework for anticipating ecological protection efforts in the area of environmental studies.

高速公路建设项目（ECP）对生态系统的负面影响引起了全球的严重关注。虽然 ECP 承包商在实施可持续建设方面是有选择性的，但他们很少被告知已做出合理努力来解决这些问题。本研究旨在制定一种定量分析方法，以帮助承包商确定生态保护工作。包括四个潜在变量：项目特征、项目感知、生态影响评价和生态保护决策。结果表明，项目感知是确定努力的基础。该决定建立在生态影响与建设活动强度之间的关系上。此外，主要的努力决策是资源消耗。