to the time needed to paint the edge line in one operation and to u201c mill u201d the conventional rumble strips in situ in a second operation c by mass producing the white yellow ipprrs in a manufacturing plant highway departments could reduce the cost and time of installing both the edge line and csrs to millions of miles of highways the disruption to traffic for installing the integrated edge line and rumble strip will be less than the current practice d ipprrs can be added to pavement surface less expensively compared to the total cost necessary to paint the edge line in one operation and to mill the conventional rumble strips in situ in a second operation e ipprrs may be prefabricated with reflective white yellow similar in pigmentation to the white continuous line on the edge of highways or reflective yellow lines in highways this appropriately pigmented rumble strip eliminates the need for painting continuous white yellow line on the right or left edge of highways thereby providing a cost saving f the pavement surface needed on highways to install both edge lines and csrs is reduced g ipprrs may be added to new or existing pavements without shoulders that lack the space on the pavement to accommodate conventional csrs 5 ipprrs preferably made of plastics polymers could be prefabricated by a processes such as rolling extruding pressing or stamping in multiples of 2 u2032 4 u2032 6 u2032 10.