Practice question

In the context of traffic noise analysis, what unit is used to measure the cumulative effect of traffic noise over a time period?

  1. Miles per hour (mph)
  2. Equivalent sound level (Leq) or day-night average sound level (Ldn) in decibels (dBA)
  3. Vehicles per hour (vph)
  4. Crash severity index

Answer: B — Equivalent sound level (Leq) or day-night average sound level (Ldn) in decibels (dBA)

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