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We estimate the transport coefficients like shear and bulk viscosities of hothadronic matter in van der Walls hadron resonance gas ( VDW HRG ) model in therelaxation time approximation. We also have compared these results withexcluded volume hadron resonance ( EV HRG ) calculations. $\eta/s$ decreases asthe temperature of the hadronic system increases at a fixed baryon chemicalpotential. $\eta/s$ in VDW HRG is always less than that of EV HRG case due tothe large entropy density in VDW HRG compared to EV HRG case. At a fixedchemical potential, $\zeta/s$ in VDW HRG is also less than that of EV HRG case.We also have estimated these transport coefficients along the freezeout curve.There is an increase in chemical freezeout temperature in VDW HRG casedetermined from the universal condition $E/N =\epsilon/n \sim 1$ $GeV$. We alsohave calculated the variation of attraction parameter along the freezeout curve$E/N =\epsilon/n \sim 1$ $GeV$ keeping the freezeout parameters same as inideal HRG and the repulsion parameter fixed. We observe a nontrivial variationof attraction parameter along the freezeout curve where it increases in themeson dominated region and decreases in the baryon dominated region along thechemical freezeout curve. $\eta/s$ in EV HRG is always large than that VDW HRGalong the freezeout curve. This is also true for $\zeta/s$.

Transport coefficients of hadronic matter in a van der Walls hadron resonance gas model