نتایج جستجو برای: crashes
تعداد نتایج: 5912 فیلتر نتایج به سال:
Motorcycle crashes with roadside objects often involve more than one impact event: typically involving a collision with the ground and another object. The objective of this study was to determine the fatality risk in these roadside object collisions when compared with crashes only involving a collision with the ground. The roadside objects analyzed included guardrails, concrete barriers, signs,...
Memory is commonly viewed as an unreliable place to store permanent data (files) because it is perceived to be vulnerable to system crashes. Yet despite all the negative implications of memory’s unreliability, no data exists that quantifies how vulnerable memory actually is to system crashes. This paper quantitatively compares the vulnerability of disk and memory to operating system crashes. We...
An analysis of Victorian truck rollover crashes using data from the VicRoads Road Crash Information System database and National Transport Insurance (NTI) was undertaken for 2003 to 2007. Recommendations for reducing the frequency and severity of truck rollover crashes were made based on the analyses and supported by relevant literature. The Victorian crash data indicated that of all truck cras...
Older drivers have elevated crash rates and are more likely to be injured or die if they have a crash. Medical conditions and medications have been hypothesized as determinants of crash involvement. This population-based case-control study sought to identify medical conditions and medications associated with risk of at-fault crashes among older drivers. A total of 901 drivers aged 65 years and ...
Identifying factors that affect crash injury severity and understanding how these factors affect injury severity is critical in planning and implementing highway safety improvement programs. Factors such as driver-related, traffic-related, environment-related and geometric design-related were considered when developing statistical models to predict the effects of these factors on the severity o...
The objective of this study was to estimate the potential effectiveness of AEB systems using simulation of crashes drawn from Australian indepth crash data. 104 crashes that occurred within 100 km of Adelaide, South Australia, were used to assess the potential effect of AEB systems. The crashes had been investigated at the scene, re-constructed to determine collision speeds, and in this study t...
Small overlap frontal crashes occur when vehicles are loaded outboard of their longitudinal structural members. Studies from the 1990s as well as current research have found that these crashes continue to account for a significant percentage of all serious frontal crashes. The National Automotive Sampling System/Crashworthiness Data System database was used to study the characteristics of these...
1 This study assesses the safety effectiveness of widening shoulder widths by developing crash 2 modification factors (CMFs) and crash modification functions (CMFunctions). This study first 3 evaluates the CMFs for widening shoulder widths on rural multilane roadways using the 4 observational before-after with the empirical Bayes (EB) method to check the overall safety effects. 5 Secondly, the ...
To reduce the involvement of young drivers in alcohol-related crashes, 29 States and the District of Columbia have established lower legal blood alcohol limits for drivers younger than age 21 than for adult drivers. Of these, 12 lowered the legal limit for young people prior to 1991. To assess the impact, these 12 States were paired for comparison with 12 nearby States matched for legal drinkin...
Crash prediction models still constitute one of the primary tools for estimating traffic safety. These statistical models play a vital role in various types of safety studies. With a few exceptions, they have often been employed to estimate the number of crashes per unit of time for an entire highway segment or intersection, without distinguishing the influence different sub-groups have on cras...
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