I have alignments and surfaces already created in InRoads and I'm concerned that converting will affect them.
You can review the suggestions and workflow we suggest and see if that helps in your situation
(+) Migrating Project Data to OpenRoads Designer - OpenRoads | OpenSite Wiki - OpenRoads | OpenSite - Bentley Communities
For more information about the Road and Site design tools, visit the Road and Site design WIKI at: http://communities.bentley.com/products/road___site_design/w/road_and_site_design__wiki