You mentioned that the adjacent development already is “underway” and that the developer recently sold 92 lots. This makes me wonder why the developer would be coming to you now about roadway frontage for a turn lane. Usually the road improvement plan is in place prior to the subdivision being formally approved and recorded and the developer secures rights to all of the land it needs for turn lanes in advance. The existence of lots in this development suggests that the road plans already should be approved. Get information from your local planning or subdivision department (as applicable, or possibly the DOT) and see if you can find the plans for offsite road improvements for this subdivision. It’s possible that there was a lapse in the planning process — or that the original roadway improvement plans have expired if the project was abandoned during the downturn — and the need for land for a turn lane has recently come to light. Do your research to understand the facts.
Your buyer profile can depend on what type of property you are selling, whether the land has been developed already, its location and market conditions, among other criteria. Is your likely buyer an individual looking for a lot for a new home? Or is your buyer going to be a builder or developer looking for land for their next project? Or is your buyer some combination of those, or someone different altogether? There may be different buyers for finished lots, rural acreage or a parcel of suburban land in a thriving new home market.