Balancing Learning and Accountability: A Curriculum Design Framework for the Two-Lane Assessment Model

The two-lane assessment model is gaining attention in response to growing demands for evidentiary assurance in the context of generative AI and digitally enabled education. The model separates secure assessment pathways (lane 1) from developmental learning pathways (lane 2), allowing institutions to support authentic learning processes while maintaining defensible evidence of student achievement. However, two-lane has largely been implemented as a retrofitted assessment intervention, due to factors such as cost and workload, rather than as a structural component of curriculum design. More recently, locating lane 1 assessment to the program level has been proposed as a more considered response, but this move introduces an unresolved curriculum design problem: if lane 1 accountability shifts to the program level, program learning outcomes (PLOs) must carry the operational burden that course learning outcomes (CLOs) previously bore, yet they are rarely designed with the specificity required to anchor valid, defensible, high-stakes assessment. This article argues that resolving this problem requires a shift in how constructive alignment (CA) is applied, locating its operational anchor at the program level and redesigning PLOs accordingly. In response, the paper proposes a curriculum design framework for CA within the two-lane model. By treating lane 1 and lane 2 as complementary design elements, the framework enables purposeful integration of developmental learning and certified achievement while maintaining coherence and credible accountability of learning in AI-mediated and online environments.