Post-installation monitoring should periodically produce results that make it possible to quantify the effectiveness of the measures adopted and the impact of the road on wildlife, so that mitigation measures can be readjusted whenever necessary as part of the environmental-license renewal process. The adaptive nature of environmental mitigation strategies should be incorporated into the practices of both licensing authorities and project proponents, which may sometimes be reluctant to make structural changes to works regarded as complete, particularly when such changes arise from environmental requirements. However, just as changes in traffic over time lead to structural adaptations intended to increase road capacity, environmental monitoring should provide sufficient evidence to justify eventual changes in mitigation strategies, whether by reducing, replacing or modifying them.
Considering that wildlife may take several years to become accustomed to mitigation structures (CLEVENGER & WALTHO 2003), that impacts on biological diversity may only become measurable after decades (FINDLAY & BOURDAGES 2000), that surrounding environmental conditions change over time, and that scientific knowledge develops and becomes consolidated gradually, monitoring and reassessment should be regarded as a long-term process. Reliable estimates require an appropriate methodology and a continuous monitoring period long enough for patterns and quantitative data to be detected and stabilized.
When each monitoring cycle produces a sound diagnosis and technically supported recommendations, the monitoring strategy can be considered satisfactory. When these recommendations are translated into the effective implementation of the required adjustments and into a reduction in the environmental impact of the road on wildlife, the mitigation project can be considered effective, fulfilling the purpose for which it was established within the environmental-licensing process and contributing to the environmental sustainability of the road system.
Translation note: This English version was preliminarily translated using ChatGPT and has not yet undergone human review.