Under 49 CFR 383.115(d), which of the following is explicitly listed as a traffic-operation problem that doubles/triples combinations create for OTHER motorists?

49 CFR 383.115(d)

This regulation exists because doubles/triples don't just create risk for the driver — federal law specifically recognizes they create problems for everyone else sharing the road, like other vehicles trying to merge onto a freeway behind a slow-accelerating triple.