Technical Reports

Test of Alerter/Emergency Braking System

  • 01
  • Jul
  • 1990
AUTHOR: L. Rohter, T. Jacobius; IIT Research Institute
SUBJECT: Braking Systems
KEYWORDS: Simulator, Locomotive, Vigilance, Human Factors, Foot Pedal, Cab Controls
ABSTRACT: The purpose of this alerting device test program was to obtain a base of data that can subsequently be used to determine the effectiveness of the tested equipment. The approach for accomplishing this was to use the Research and Locomotive Evaluator/Simulator (RALES) full-scale locomotive simulator at IIT Research Institute (IITRI) to create realistically simulated but controlled conditions. The RALES simulator, built and operated by IITRI for the Federal Railroad Administration (FRA), is recognized by experienced railroad personnel as offering the best available alternative to actual locomotive operation for training enginemen. This means that, under properly designed and controlled conditions, it offers an acceptable replica environment for testing the efficiency of new equipment. The basic experiment design strategy was to subject several experienced and active enginemen to simulator sessions that test the use of the alerting device. In order to develop a sufficient base of data, 16 test subjects were required. The 16 test subjects were randomly assigned to eight test groups. The groups were defined so that the variables having an influence on the measurement of alerting device effectiveness were properly controlled with or without alerting device equipment and with or without rest. The alerter/emergency braking system was then tested on the RALES simulator and the appropriate data bases were developed. Each subject was tested over the same track run a total of four times over a two-day period. Two runs were made back-to-back on the first day and two runs were made back-to-back on the second day. Each of the four runs lasted approximately one and one-half hours. The results of the exit interviews conducted with the enginemen are summarized. Contract: DTFR53-82-C-00254 / Task Order No. 2
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