Preliminary Announcement On The Transport Lines 215, 241, 250, 251, 252, 253, 254, 255, 716, E252, E253, E255 As Well As The Regional Bus Line 8A, 12 Para. 6, 13 Pbefg And §§ 119 Gwb, Which Are To Be Awarded As Part Of A Competitive Award Procedure In Accordance With Regulation (Ec) No. 1370/2007, §§ 8, 8A Para. 1 And 2, Pbefg And §§97 Ff Gwb (Gross Contract)