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Ten of the 11 violations noted involved speed limits. Train speed was checked through use of radar or by a comparison of mileposts versus elapsed time. Because the "old" cars were not equipped with speedometers, an allowance of 5 m.p.h. was permitted on maximum running speeds for these cars. This allowance did not apply for restricted speed.
During the Safety Board's investigation, the six crewmembers were asked for their interpretations of various operating rules. The official ICG interpretation was furnished by the Manager, Rules and Training. The ICG interpretations, however, were given after the accident, and there were no documented interpretations which predated the accident. Table 1 compares the crewmembers' interpretations with those supplied by the railroad after the accident.
