Another way to build new roads is to use the pave mode in your mobile app. Use the reports button. In some countries, there will be a large button with a picture of a yellow tractor. In other countries, choose "map issue" and then "Pave" and follow the instructions. As soon as you get far enough away from a known road, Waze will start recording your movement as new road segments, with junctions (nodes) at your turns. When Waze detects that you are back on a known road, road building mode is automatically paused.