These cranes typically drive very slow (<30 mph) due to their gear ratios, short wheel base and lack of suspension.

• A. All-terrain cranes
• B. Rough terrain cranes
• C. Crawler cranes
• D. Tower cranes

Answer: (B)

The speed of a crane on roads is tied to its intended use and how its driveline and chassis are designed. Rough terrain cranes are built to move over rough, uneven job-site surfaces with a four-wheel-drive setup, a rigid frame, and little or no suspension. That combination prioritizes high torque and stability for lifting on challenging ground rather than sleek highway travel. The gear ratios are chosen to maximize lifting power and traction, not to maximize top speed, so these cranes typically stay under about 30 mph.

This is different from all-terrain cranes, which are designed to travel efficiently on roads as well as work off-road, and usually feature better suspension and a longer wheelbase to support higher highway speeds. Crawler cranes run on tracks and aren’t meant for road speeds at all, and tower cranes are stationary once set up.