Final answer:
Conventional forklifts are limited by their inability to effectively drive on rough terrain, due to design factors affecting their stability and maneuverability on uneven surfaces.
Step-by-step explanation:
One characteristic that limits conventional forklifts is their inability to drive on rough terrain. Conventional forklifts are primarily designed for operation on smooth, even surfaces and may struggle with uneven grounds found in outdoor settings or construction sites. This limitation stems from their wheel design, ground clearance, and overall stability considerations. Forklifts often make use of hydraulic and mechanical lever systems to lift and move heavy loads, but when it comes to driving over rough terrain, specialized equipment such as rough terrain forklifts or other heavy machinery might be required.