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Profile data extraction from .dgn file

Hai everyone,

I am new to microstation. So kindly bear my ignorance and offer me help. I have a .dgn file of a major highway interchange  from which I have to extract profile information of the roads. Is it possible to extract .tin file from a .dgn file ?The file has lot of layers in it. Also there are texts in drawing, like " name_of_road.tin". Does this mean that the tin file is associated with the .dgn file. ?

I can upload some screen shots of the .dgn file but i dont see an attach option in this thread.

Kindly help.