Wisconsin Class D Knowledge Test Practice
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Passing target: 80% (52/65)
You approach a two-lane roundabout in the right lane. A semitruck in the left lane arrives at the same time. Its trailer will use part of your lane as it goes around. What does Wisconsin law require?
At a two-lane roundabout entry, blue A occupies the right lane and a white semitruck B occupies the left. Their fronts reach the entry together; the given trailer-space fact is in a neutral card.
Correct answer: Slow down or stop, and let the semitruck go through first.
Why
The trailer of a long truck follows a tighter path than the cab, so it often crosses into the next lane in a roundabout. Wisconsin law lets these large vehicles leave their lane when needed and requires other drivers to yield to them. Never drive beside a large truck in a roundabout; wait behind it or let it go first.
Verified against Wisconsin Motorists' Handbook · Roundabouts · p. 43
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