Why must doubles/triples drivers manage following distance even more carefully than single-trailer drivers?

FOLLOWING DISTANCE FOR DOUBLES/TRIPLES: These long, heavy combinations need MORE following distance than single trailers: STOPPING DISTANCE: Greater weight and length means more momentum and longer stopping distance; SPACE TO MANEUVER: Lane changes and merges take more time and room (the long combination must fully clear); HARD BRAKING risks instability, so smooth gradual braking is needed — which requires anticipating stops early with adequate space; RULE OF THUMB: At least 1 second of following distance for every 10 feet of vehicle length at speeds under 40 mph (a 100-foot triple combination needs at least 10 seconds); add 1 second for speeds over 40 mph; add more for adverse conditions (rain, snow, downgrades); MANAGING SPACE: Space ahead (following distance), space to the sides (lane position, blind spots), space behind, and space to maneuver; the long combination needs a larger 'space cushion' all around; ANTICIPATION: With longer stopping distances, the driver must look far ahead and anticipate stops, slowdowns, and the need to change lanes early; insufficient following distance is especially dangerous for doubles/triples because they cannot stop or maneuver as quickly as shorter vehicles; generous space management is essential.