Examkin

Soru

Zorluk: OrtaSpace Overhead

State highway maintenance crews often repave roadway surfaces without immediately updating overhead bridge warning signs. In this situation, why is relying strictly on the posted clearance sign hazardous for a commercial motor vehicle driver?

  1. A
    The fresh asphalt provides extra grip that alters load balance, raising the vehicle's center of gravity toward the bridge.
  2. Repaving adds layers of asphalt that elevate the road surface, making the actual vertical clearance less than the posted height.Cevap
  3. C
    The freshly paved road surface magnifies trailer off-tracking, pulling the top corners of the vehicle into bridge supports.
  4. D
    The smoother pavement increases total stopping distance, which legally invalidates the height values shown on clearance markers.

Cevap

Repaving adds layers of asphalt that elevate the road surface, making the actual vertical clearance less than the posted height.
Repaving projects place additional layers of paving material on the roadbed, elevating the driving surface. If clearance signs are not remeasured and updated, the posted height will show more vertical clearance than actually exists, putting commercial vehicles at risk of striking the overhead structure.

Adım Adım Çözüm

1
Analyze how roadway resurfacing physically alters the roadway profile underneath fixed overhead structures.
Repaving applies new layers of asphalt on top of existing pavement, effectively raising the grade level of the road.
Unless the old roadbed is milled down completely, new paving material diminishes the physical vertical distance between the road surface and the overhead obstacle.
2
Evaluate the relationship between the physical clearance and older posted warning signs.
Posted bridge clearance signs often reflect measurements taken before the repaving project occurred.
Sign updates frequently lag behind maintenance work, meaning the posted height overstates the actual available clearance.

Anahtar Kavram

Overhead Clearance Reduction from Road Resurfacing
Tahmini Süre:1m 0s
Bu soruyu puanla

Konular

Space Overhead

Bu konudan daha fazla soru