I'm currently using Power InRoads V8i SS4. In the past I've used the process in the link below to convert a DTM to a TTM for use in my Trimble survey grade GPS. I've been unable to recreate this process with a new computer. Any help with how to create convert a dtm to a ttm is appreciated.
I also have Open Roads Designer on my computer if that is my only option.
https://communities.bentley.com/products/road___site_design/w/road_and_site_design__wiki/9335/exporting-to-trimble-format
Thanks
Paul Backhaus