Hi Daniel,
Give this a try. Under File>Project Options>Abbreviations, set your EQNBK to “STA. L.B.” and your EQNAHD to “STA.” only. Under Geometry>Horizontal Curve Set>Stationing, when adding your Station Equation at Ahead Station: key-in “L.A.” This should give you STA. L.A. XX+XX and STA. L.B. XX+XX for your Station Equation.
Thanks,
Sanders