Before revision:  On the basis of analytical treatment of our model, we predict the effects of lane changing on the flux of the KIF1A motors . Our quantitative predictions can be tested, in principle, by carrying out {\it in-vitro} experiments with fluorescently labelled KIF1A molecules.
After revision:  On the basis of analytical treatment of our model, we predict the effects of lane changing , depending on the concentrations of motors and the rate of hydrolysis of ATP, the ``fuel'' molecules. Our predictions can be tested, in principle, by carrying out {\it in-vitro} experiments with fluorescently labelled KIF1A molecules.