It looks like you cannot copy or offset linestrings of a side slope and have these be independent entities. There are many cases where I need to take strings from a side slope and clean these up. As far as I know, there is not way to explode or extract strings from a side slope ( except create linestring and append). Am I missing something? If not, please consider adding the option to copy, offset a string from a side slope and not have this new line tied to the side slope or extract 1 string or multiple strings from a side slope.