Skip to main content

Currently Skimming:


Pages 30-41

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.


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.
From page 31...
... Thus, none of the survey results on either form can be generalized to larger respondent groups or populations such as "North American carrier safety managers" or "experts in motor carrier safety." The value of the survey results is not based on representativeness to larger populations, but rather on the respondents' answers to specific questions relative to other, similar questions. For example, which operational factors are most associated (positively or negatively)
From page 32...
... 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.
From page 33...
... A seven-point Likert rating scale was used for responses, ranging from −3 (reduces fleet safety) through 0 (no effect on safety)
From page 34...
... Four practices received the highest mean ratings: (4) reducing loading and unloading delays, (5)
From page 35...
... Require drivers to complete a trip plan prior to trip.
From page 36...
... 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)
From page 37...
... 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.
From page 38...
... 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.
From page 39...
... This respondent group considered temporary driver states (b) to be the strongest factor affecting crash risk.
From page 40...
... 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)
From page 41...
... 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.


This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More information on Chapter Skim is available.