When evaluating road sweepers, prioritize the suction power (measured in Pa) and the sweeping width, which typically ranges from 1,200mm to 3,500mm depending on the model. Ensure the hopper capacity (debris tank) and water tank volume align with your operational area to minimize downtime for emptying. For motorized versions, verify the engine brand (e.g., Cummins or Isuzu) for reliability, or the battery capacity (Ah) and endurance mileage for electric models to ensure they can complete a full shift on a single charge.