RattRoads is an NRT (NotRoadTypes) NewGRF providing a set of new roadtypes for use in OpenTTD and is the successor and replacement to ARRS. There are 6 roadtypes available ranging from dirt roads to modern paved highways. There are several parameters available to tune settings such as cost, speed, and introduction dates to suit the desired playstyle. Visit the release topic at TT-Forums for more details: RattRoads.