Location: I-55 and I-12, Tangipahoa Psh Just after the I-12 interchange we’ll quickly come up on US 51. Location: I-55 and US 51, Tangipahoa Psh Exit for US 51 north. US 51 south joins I-55 into New Orleans.  S to LA-22, N to US-190  S to LA-22, N to I-12   E to LA-3158, W … Continue reading Interstate 55, I-12 to US-51