Structural undervaluation of fuels that achieve lower carbon intensities in turn reduces the amount of money available to further develop these technologies. While the LCFS and CFR structurally promote the production of fuels that achieve the lowest carbon intensities (i.e., they generate program credits based on CI reductions), program methodological requirements may still lead to the mischaracterization and undervaluation of these fuels. Due to its CI threshold-based structure, the RFS does not properly incentivize the production of fuels that achieve lower CIs. Advanced energy feedstocks such as miscanthus have the potential to significantly lower the CI of SAF production, but this potential is not properly accounted for by existing program provisions. For all three low carbon fuel policies, issues with fuel characterization could be resolved by allowing fuel producers to calculate total fuel CIs that account for field-specific biomass production. Fieldspecific LCA presents a practicable means to more accurately quantify the outcomes of biofuel production and help society realize the benefits of cellulosic biofuels.