sentences:  The only portion of SR 88 that is part of the National Highway System, a system of routes determined to be the most important for the nation's economy, mobility, and defense, is the entire SR 540 concurrency, from east of Sandersville to Wrens.The route of SR 88 is being absorbed into the Fall Line Freeway, which is planned to extend from the Alabama state line in Columbus to an interchange with Interstate 520 in Augusta.It could also become part of the future I-14.