Complex sentence: Further extension along the B 288, across the Rhine and into Krefeld, is not listed in the "Bundesverkehrswegeplan" as a necessary project; rather, it is considered something that will only become necessary in the future.
Split into simpler sentences: Further extension along the B 288, across the Rhine and into Krefeld, is not listed in the "Bundesverkehrswegeplan" as being necessary at the present time. Rather, it is considered something that will only become important in the future.