Steric hindrances are caused by rotation around single bonds. The corrections for cis-alkene are not included because this is not represented in the current molecular form. The 2D-graphical representation has no spatial component cis-trans information would have to be given as supplementary flag to the double bond. Steric hindrances are determined also by substructure matching. In these cases, the spatial information is implied by the structure. When a substructure is found in the molecule, then the thermodynamic quantities associated with that structure are applied.