A vacuum box adapted to be in fluid communication with water and debris generated by a pavement marking removal tractor, comprising: a generally cubical structure including a top wall, a bottom wall, a front wall, a back wall, a left side wall and a right side wall that are engaged to one another to form a structure having a hollow interior; a sloped false bottom wall disposed within said hollow interior, said sloped false bottom wall having a forward, elevated end attached to said front wall in vertically spaced, upward relation to said bottom wall and having a rearward, lower end attached to a rearward end of said bottom wall; said back wall having a vertical extent less than a vertical extent of said left and right side walls; an opening between a lower edge of said back wall and said rearward edge of said sloped false bottom wall; a vacuum inlet mounted to said cubical structure, said vacuum inlet having an open configuration and a closed configuration, and said vacuum inlet adapted to be in fluid communication with a source of negative pressure so that a vacuum is maintained within said hollow interior when said vacuum inlet is in said open configuration; a debris inlet forming a part of said cubical structure, said debris inlet having an open configuration and a closed configuration, and said debris inlet adapted to be in fluid communication with water and debris to allow water and debris to enter into said hollow interior when said vacuum inlet and said debris inlet are in their respective open configurations; and a door mounted in closing relation to said opening, said door having an open configuration and a closed configuration; said door being in said closed configuration when debris and water are generated; and said door being in said open configuration to allow debris to slide down said sloped false bottom wall and out of the hollow interior of said vacuum box; wherein said debris inlet is formed in the top wall or in the back wall of said vacuum box; said sloped false bottom wall is sloped at an angle greater than an angle of repose, said angle of repose being an angle at which debris collected atop said sloped false bottom wall is held against sliding by frictional forces; said angle of said sloped false bottom wall being greater than said angle of repose allowing debris to discharge and slide out without additional input from an operator performing a discharging operation; and brackets are secured to the top wall for being engaged by lifting hooks when said vacuum box is lifted for installation or removal. a generally cubical structure including a top wall, a bottom wall, a front wall, a back wall, a left side wall and a right side wall that are engaged to one another to form a structure having a hollow interior; a sloped false bottom wall disposed within said hollow interior, said sloped false bottom wall having a forward, elevated end attached to said front wall in vertically spaced, upward relation to said bottom wall and having a rearward, lower end attached to a rearward end of said bottom wall; said back wall having a vertical extent less than a vertical extent of said left and right side walls; an opening between a lower edge of said back wall and said rearward edge of said sloped false bottom wall; a vacuum inlet mounted to said cubical structure, said vacuum inlet having an open configuration and a closed configuration, and said vacuum inlet adapted to be in fluid communication with a source of negative pressure so that a vacuum is maintained within said hollow interior when said vacuum inlet is in said open configuration; a debris inlet forming a part of said cubical structure, said debris inlet having an open configuration and a closed configuration, and said debris inlet adapted to be in fluid communication with water and debris to allow water and debris to enter into said hollow interior when said vacuum inlet and said debris inlet are in their respective open configurations; and a door mounted in closing relation to said opening, said door having an open configuration and a closed configuration; said door being in said closed configuration when debris and water are generated; and said door being in said open configuration to allow debris to slide down said sloped false bottom wall and out of the hollow interior of said vacuum box; wherein said debris inlet is formed in the top wall or in the back wall of said vacuum box; said sloped false bottom wall is sloped at an angle greater than an angle of repose, said angle of repose being an angle at which debris collected atop said sloped false bottom wall is held against sliding by frictional forces; said angle of said sloped false bottom wall being greater than said angle of repose allowing debris to discharge and slide out without additional input from an operator performing a discharging operation; and brackets are secured to the top wall for being engaged by lifting hooks when said vacuum box is lifted for installation or removal.