When making a lane change with a doubles or triples combination, you should:
a.Change lanes quickly to minimize time spent between lanes
b.Signal early, check mirrors carefully, and change lanes gradually
c.Only change lanes on straight roads and never on curves
d.Use your horn to alert other drivers before changing lanes
Explanation
When changing lanes with doubles or triples, signal well in advance, check all mirrors carefully for traffic, and make the lane change gradually and smoothly. Quick lane changes cause the crack-the-whip effect and increase the risk of rollover.