A product display system for the display of products in individual lanes, which comprises - a left side lane member in the form of an L-shaped extrusion of plastic material having a vertical side wall and a horizontal base element extending inward from said side wall, - a right side lane member in the form of a reverse L-shaped extrusion of plastic material having a vertical side wall and a horizontal base element extending inward from said side wall, and - one or more center lane members, each in the form of an extrusion of plastic material of inverted T-shaped configuration having a vertical divider wall and upper and lower horizontally disposed base elements (52, 53) extending in opposite directions from said divider wall, - said lower base element being formed across a full width thereof on an upper face thereof with a plurality of longitudinally extending alternating grooves and upward projections, - the upper base element of said center lane member being disposed at an elevation above that of said projections and, when joined with a lower base element of an adjacent lane member (50, 54), being configured to overlie projections of said adjacent lane member, - said upper base element being formed at an outer edge thereof with a downwardly projecting element configured for engagement with a projection or groove of a lower base element of a lane member (50, 54) positioned adjacent to said center lane, - the base elements (52, 53) of said side lane members (54, 55) being configured for engagement with a base element (52, 53) of an adjacent center lane member, - the vertical divider walls of the center lane members being formed on one side thereof with one or more longitudinally extending pusher mounting track elements (63, 64, 65) for the slidable mounting of a product pusher, and - the vertical side wall of one of said left or right side lane members being formed on a side thereof corresponding to said one side of said divider walls with one or more longitudinally extending pusher mounting track elements (63, 64, 65) for the optional slidable mounting of a product pusher. - a left side lane member in the form of an L-shaped extrusion of plastic material having a vertical side wall and a horizontal base element extending inward from said side wall, - a right side lane member in the form of a reverse L-shaped extrusion of plastic material having a vertical side wall and a horizontal base element extending inward from said side wall, and - one or more center lane members, each in the form of an extrusion of plastic material of inverted T-shaped configuration having a vertical divider wall and upper and lower horizontally disposed base elements (52, 53) extending in opposite directions from said divider wall, - said lower base element being formed across a full width thereof on an upper face thereof with a plurality of longitudinally extending alternating grooves and upward projections, - the upper base element of said center lane member being disposed at an elevation above that of said projections and, when joined with a lower base element of an adjacent lane member (50, 54), being configured to overlie projections of said adjacent lane member, - said upper base element being formed at an outer edge thereof with a downwardly projecting element configured for engagement with a projection or groove of a lower base element of a lane member (50, 54) positioned adjacent to said center lane, - the base elements (52, 53) of said side lane members (54, 55) being configured for engagement with a base element (52, 53) of an adjacent center lane member, - the vertical divider walls of the center lane members being formed on one side thereof with one or more longitudinally extending pusher mounting track elements (63, 64, 65) for the slidable mounting of a product pusher, and - the vertical side wall of one of said left or right side lane members being formed on a side thereof corresponding to said one side of said divider walls with one or more longitudinally extending pusher mounting track elements (63, 64, 65) for the optional slidable mounting of a product pusher.