Safety Impacts of Speed Limiter Device Installations on Commercial Trucks and Buses (2008) / Chapter Skim
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Pages 5-13
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From page 5... ...
(2002) found that 23 states had raised their rural Interstate speed limits to 70 or 75 mph and modeled the number of vehicular fatalities on rural Interstates from 1991 to 1999 against the new speed limits in these states (e.g., 75 mph, 70 mph, or no CHAPTER TWO RESULTS OF LITERATURE REVIEW
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From page 6... ...
More than threequarters of respondents who favored speed limiters supported a maximum speed limit below 70 mph. More than 80% of drivers reported that speeding on Interstate highways and freeways was a safety problem, whereas 40% of drivers reported that speeding was a "big" safety problem.
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From page 7... ...
However, they also indicated that enforcement was costly and ineffective and rated speed limiters as the most effective means for reducing speed. The concept of intelligent speed adaptation (ISA)
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From page 8... ...
reported results from the LAVIA project. A questionnaire of 1,000 drivers assessed driver's opinions toward speed, safety, and speed limiters.
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From page 9... ...
Even though local and short-haul CMVs operate on arterials and residential streets as well, the speed limits on those types of roadways are likely to be well below the CMV speed limiters set speed. Furthermore, much 10 of the challenge in deploying ISA relates to creating and maintaining a map database with accurate information of posted speed limits, an issue that does not relate to commercial vehicle speed limiters.
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From page 10... ...
, buses, and coaches and to midi-coaches and minibuses. We also note that the fitment of top speed limiters may reduce speeds on trunk roads and motorways, but will have no effect on urban roads, or roads through rural towns and villages, which have lower speed limits, and where driving at inappropriate speed (rather than excessive)
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From page 11... ...
As of the writing of this report, NHTSA received approximately 3,700 responses to the docket. Supporters, including advocacy groups and truck fleets, cited both fuel economy and safety as key reasons to adopt speed limiters.
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From page 12... ...
Unfortunately, although the Netherlands field test earlier assessed the effects of speed limiters on truck fuel consumption, maintenance costs, damage costs, and speeding tickets, safety was not addressed (Vermeulen and Klimbie 2002)
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From page 13... ...
Overall, 63% of carriers reporting using speed governors. Those carriers that used speed governors accounted for 77% of the trucks represented by carriers who responded to the survey, a testament to the increased likelihood among larger carriers to use speed limiters.
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