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Project Experience: Railroad Capacity Improvements, Alaska

The Challenge

The Alaska Railroad Corporation (ARRC) needed noise and vibration services related to planned capacity improvements and increased passenger train service.

The Strategy

HMMH services included:

  • Performing noise and vibration measurements in the winter, spring and summer to determine the effects, if any, on noise and vibration by season. The analysis has shown frozen ground may not transmit the vibration as efficiently in some soil types
  • Conducting controlled measurements on passenger trains to determine the effects of  speed on both noise and vibration. ARRC is investigating the potential for operating passenger trains at higher speeds without causing higher vibration levels than those currently generated by slower moving freight trains
  • Determining if ground-borne vibration or air-borne noise-induced vibration is the source for vibration complaints from residents living near the tracks

The Solution

Our client, ARRC, was equipped with the data necessary to move forward with its planning capacity and service improvements.