ALG is an InRoads database for alignments. You should be able to send a LandXML file which they can import to their ALG, but check with them first. C3D does not directly write to ALG (AFAIK)
Neil Wilson (a.k.a. neilw)
AEC Collection/C3D 2024, LDT 2004, Power Civil v8i SS1
WIN 10 64 PRO
http://www.sec-landmgt.com