Location: A-2D and MX-55, Ixtapan de la Sal Reassurance shield for …state 4 erroneously signed as federal 4 as we enter Ixtapan. Just ahead we’ll merge onto 55 south without signage.  N to MX-55 Libr  S to MEX-7, N to MX-55 Libr/MEX-A2D  S to MX-55, N to MX-55  S to MX-55