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Roadway Design & Maintenance Flashcards

7 cards from real NETTCP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Roadway Design & Maintenance flashcards as text
  1. When patching a pothole using the throw-and-roll method, what is the MOST critical step to ensure patch durability?

    Answer: Compacting the patch with a roller or vehicle tires

    Compaction is the most critical step in throw-and-roll patching because it bonds the material and eliminates voids that cause premature failure.

  2. In New England, frost heave damage to pavements is primarily caused by which soil mechanism?

    Answer: Ice lens formation drawing water upward through capillary action in frost-susceptible soils

    Ice lenses form when water migrates upward through capillary action in fine-grained soils and freezes, causing differential heaving of the pavement.

  3. What is the design purpose of a clear zone along a rural highway?

    Answer: To give errant vehicles a recoverable area free of fixed obstacles

    The clear zone is a traversable, obstacle-free area beyond the edge of the traveled way that allows errant vehicles to recover or safely stop.

  4. Which factor MOST directly influences the selection of guardrail end treatment type at a hazardous terminal?

    Answer: The traffic volume and posted speed limit

    End treatment selection is governed by the speed of approaching traffic and volume, because crash tests are classified by impact speed requirements under MASH or NCHRP 350.

  5. A crew is crack sealing an asphalt pavement. At what minimum crack width should routing be performed before sealing?

    Answer: Greater than 1/2 inch to 1 inch

    Cracks wider than approximately 1/2 inch benefit from routing to create a uniform reservoir that improves sealant adhesion and long-term performance.

  6. What is the recommended maximum cross-slope for a paved shoulder on a rural highway to promote drainage?

    Answer: 5%

    AASHTO guidelines recommend paved shoulders have a cross-slope of approximately 4–5% to ensure positive drainage away from the travel lane.

  7. During a pavement condition survey, International Roughness Index (IRI) measures which roadway characteristic?

    Answer: The longitudinal profile variation that affects ride quality

    IRI quantifies the vertical deviations of a road surface that affect vehicle response and ride quality, expressed in inches/mile or m/km.