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Question

Difficulty: MediumSpeed and Road Conditions

Match each adverse road surface condition or traction hazard with the correct vehicle speed adjustment or control action required by commercial driving safety standards.

  • Wet pavement surfaceReduce operating speed by approximately one-third (1/31/3) to maintain adequate traction.
  • Packed snow on roadwayReduce operating speed by one-half (1/21/2) or more to maintain directional stability.
  • Icy road surfaceReduce vehicle speed to a crawl and stop driving as soon as safely possible.
  • Active hydroplaning conditionRelease the accelerator without applying service brakes and steer straight ahead.

Answer

Wet pavement pairs with reducing speed by approximately one-third; Packed snow pairs with reducing speed by one-half or more; Icy road surface pairs with reducing speed to a crawl and stopping safely; Active hydroplaning pairs with releasing the accelerator without braking.
Official commercial vehicle safety guidelines establish distinct speed reduction fractions and driver protocols based on surface traction: wet pavement mandates a reduction of about one-third, packed snow mandates a reduction of one-half or more, icy surfaces require slowing to a crawl until safely stopped, and hydroplaning requires releasing the throttle without braking to regain pavement contact.

Step-by-Step Solution

1
Identify the standard CDL speed reduction guidelines for precipitation and winter precipitation road conditions.
Wet roads require a 1/31/3 speed reduction, packed snow requires a reduction of 1/21/2 or more, and icy surfaces require reducing speed to a crawl.
Establishing standard regulatory benchmarks ensures appropriate traction management for each specific surface hazard.
2
Identify the emergency control technique for dynamic hydroplaning.
Releasing the throttle and avoiding brake application allows the tires to re-establish traction with the road surface without provoking a wheel-lock skid.
Applying service brakes while tires are separated from the road by water can cause instant loss of vehicle control.
3
Match each roadway condition with its corresponding operational requirement.
All four pairs are matched to their precise safety requirements.
Aligns specific traction levels with proper speed adjustments and driver interventions.

Key Concept

Speed adjustment and vehicle control across variable road surface conditions
Estimated Time:1m 0s
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Topics

Speed and Road Conditions

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