VEHICLE SIDE SILL STRUCTURE

A vehicle side sill structure can include an inner side sill fixed to a floor of a vehicle, an outer side sill joined to the inner side sill, and a first reinforcement and a second reinforcement disposed in a cavity defined between the inner side sill and the outer side sill, where the first reinforcement is fixed to the inner side sill, and the second reinforcement is fixed to the outer side sill.