Commercial vehicle handling requires precise speed adjustments and operational safeguards to account for varying surface friction. Match each specific hazardous road condition with its corresponding federally mandated speed adjustment and operating procedure.
- Wet pavement during sustained rainfallReduce vehicle speed by approximately one-third while disengaging auxiliary retarders to prevent drive-wheel lockup.
- Packed snow covering the roadwayReduce vehicle speed by at least one-half of the normal rate to compensate for significantly diminished tire grip.
- Black ice or glaze on elevated bridge decksReduce vehicle speed to a crawl and exit the travel lanes to park safely as soon as possible.
- Active hydroplaning with loss of steering controlRelease the accelerator pedal without applying the service brakes to allow the tires to regain rolling traction.
Answer
Wet pavement matches with reducing speed by about one-third and disengaging retarders; packed snow matches with reducing speed by at least one-half; black ice matches with reducing speed to a crawl and seeking safe parking; active hydroplaning matches with releasing the accelerator without braking.
Each hazardous condition dictates a specific reduction in vehicle speed and mechanical handling: wet surfaces require a one-third reduction with retarders disengaged, packed snow requires a reduction of at least one-half, ice requires reducing to a crawl, and hydroplaning demands releasing the accelerator without braking.
Step-by-Step Solution
Key Concept
CDL Speed Adjustment Rules and Traction Control for Compromised Road Surfaces
Estimated Time:1m 30s