The term 'WIDENED' is the crossword solution for the phrase 'added a lane to'. Widening a road or highway involves adding an additional lane to the existing roadway, which can help to reduce traffic congestion and improve safety. This is often done by expanding the existing lanes or by adding a new lane to the side of the existing roadway. Widening a road or highway can also be done to accommodate larger vehicles, such as trucks, buses, and recreational vehicles.