Self-Propelled Road Wideners are available in 8- and 10-ft. paving widths. Single- and double-sided self-propelled road wideners are available. This road widener handles a variety of widening applications and materials & can widen roads from 1 foot to 12 feet. It has optional long conveyor and weight kit, it can widen roads up to 14 feet. Both single and double sided self-propelled road wideners are available in 10-foot paving widths. It has a 2.5-cubic-yard fold-up hopper and a 15-inch, variable-speed conveyor.