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Difficulty: MediumSpace for Turns

When approaching an intersection with two designated left-turn lanes, a commercial driver operating a combination vehicle should always initiate the turn from the outside (right-hand) left-turn lane.

Answer: Answer

Answer

True
According to commercial driving safety regulations, when an intersection provides multiple left-turn lanes, drivers of commercial motor vehicles must always choose the right-hand (outside) left-turn lane. This position accommodates vehicle off-tracking, prevents the trailer from sweeping across adjacent traffic lanes, and ensures passing or turning traffic remains on the driver's left side where mirror visibility is best.

Step-by-Step Solution

1
Analyze the spatial dynamics of combination vehicles during left turns across multiple turn lanes.
Due to off-tracking, the rear trailer wheels follow a significantly tighter turning radius than the tractor's steer axle.
Off-tracking creates a hazard where the trailer can encroach into adjacent lanes during the turning maneuver.
2
Evaluate the risks associated with choosing the inside versus outside left-turn lane.
Starting from the inside lane forces the trailer to sweep across the outer turn lane or requires the driver to swing right before turning.
Using the outside (right-hand) lane keeps turning traffic on the driver's left mirror side and ensures off-tracking stays within clear roadway space.
3
Determine the proper CDL standard procedure for dual left-turn lanes.
The commercial vehicle must initiate the maneuver from the right-hand (outer) turn lane.
This positioning prevents side-swipe collisions and maximizes mirror visibility of adjacent turning traffic.

Key Concept

Dual left-turn lane positioning and off-tracking management
Estimated Time:45s
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Topics

Space for Turns

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