Potential Safety Benefits of Motor Carrier Operational Efficiencies (2011) / Chapter Skim
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Pages 30-41
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From page 30... ...
The safety-manager sample consisted of individuals participating in trade associations or national meetings relating to motor carrier safety. The e-mail addresses of these individuals were known to the project team, or paper survey forms were distributed directly to them in trade association meetings.
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MOTOR CARRIER SAFETY-MANAGER SURVEY METHODS This section describes methods specific to the safety-manager surveys. Safety managers were the respondent group of greatest interest for the study.
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Questionnaire Distribution and Analysis Two commercial motor vehicle trade associations, the Truckload Carriers Association and the Bus Industry Safety Council, assisted the study by distributing paper survey forms (both for this project and MC-22) at national meetings.
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Driving Situations and Operational Practices Possibly Affecting Fleet Safety Questions 3 to 17 presented 16 driving situations and operational practices, preceded by the following general instructions: The following are driving situations or carrier operational practices which may reduce, not affect, or improve fleet safety. Assign each situation or practice a negative value if it decreases safety, zero if it does not affect safety, or a positive value if it improves safety.
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Four practices received the highest mean ratings: (4) reducing loading and unloading delays, (5)
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Require drivers to complete a trip plan prior to trip.
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Require drivers to complete a trip plan prior to trip 0 2 4 14 5 25 3.9 (23) Use general GPS navigation/routing systems or services 1 2 10 24 4 41 3.7 (24)
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Question 32 asked their years of experience as a safety manager or human resource manager, and Question 33 asked their total years of experience in commercial truck or bus operations. Table 11 provides summary statistics of their answers.
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for effect on fleet safety; • A multiple choice question on the general relationship between carrier efficiency and safety; • An open "comments" space; and • Two questions on respondent's years of motor carrier safety-related experience and on specific types of positions held. Questionnaire Distribution and Analysis The other-expert survey was administered only online through TRB's online survey service.
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This respondent group considered temporary driver states (b) to be the strongest factor affecting crash risk.
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Monitor fuel economy for individual drivers and provide feedback 0 0 1 12 13 4 1 31 +1 +0.7 8.0+:naeMdnarG Avg. = Arithmetic average (mean)
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The percentages shown sum to well over 100%, because most respondents gave multiple responses. The results show that the experience base of the other experts was both extensive and varied, with heavy representation of individuals with backgrounds in government, industry trade associations, safety consulting, accident investigation and data analysis, and motor carrier safety research.
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