This paper describes a new method by which the positive, negative resistance to ground of DC bus and branch could be tested precisely by mere use of universal instruments and standard resistors.
The results indicate that when the road length is less than 500 meters, the bus-only lane exerts negative impact on the road traffic operation.
结果表明，在路段长度小于500米时，设置公交专用道往往会对路段的交通运行产生负面影响。
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School bus safety problems reflect the problems to many children's health issues, schools, parents, school bus drivers, the negative impact of the various classes.