Technical Reports

Northeast Corridor Cant Deficiency Tests for the Evaluation of Passenger Comfort in Curves

  • 30
  • Nov
  • 1978
AUTHOR: Federal Railroad Administration
SUBJECT: Evaluation
KEYWORDS: Passenger Comfort, Curves, Northeast Corridor, Cant Deficiency
ABSTRACT: This report evaluates the overall ride comfort and measure actual lateral acceleration on the passenger in typical curves on the Northeast Corridor at vehicle unbalances in excess of 3 inches. The five major objectives of the test are: perform the tests with Amfleet equipment on selected typical curves in the Northeast Corridor on wood and concrete tie track; obtain a numerical subjective comfort rating from riders in the train in each curve tested; measure the actual lateral acceleration on the passenger with accelerometers on each curve; compare measured lateral accelerations with calculated values of lateral acceleration; and statistically correlate passenger subjective comfort ratings with selected physical ride characteristics which might influence the comfort rating. In conclusion, it is determined that at 6ā€¯ of vehicle unbalance, the average comfort rating was between 6 and 7. The average lateral acceleration, vibration, and ride quality index were all approximately 10-60 percent worse in the rear of the last car as compared with the middle of the second car. The measured lateral force on the passenger was found to increase approximately at .020g per inch of unbalance. A new equation has been formulated to evaluate the comfort in curves.
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