An Assessment on Environmental Effects of Dedicated Bus Lane
Date Issued
2004
Date
2004
Author(s)
Ying, Yeh Kaun
DOI
zh-TW
Abstract
For the reason of substantial increase in automobile in this decade, the ratio of using energy in transportation section is growing up, especially in the urban area. The inefficiency transportation modes had caused the negative influence on environment. It has caused serious problems not only in traffic jam, but also in discharging a large number of air pollutants. According to the estimation of Taiwan Environment Protection Administration (EPA), there are 42.08% air pollutants originated in vehicle emission, in which 16.97% caused by motorcycles and 24.83% are caused by automobiles. Under the awakening of environmental protection by the gerneral public, the problems in air pollution and energy consumption caused by traffic activities are more and more crucial, and simultaneously, they have become the goals that environment protection and transportation authorities are devoted to improvement.
The white paper of transportation strategy of various cities has specifically noted that the keys of transportation strategies are the development of public transportation and the increase usage of public transportation. Under this objective, using low cost and easy application of dedicated bus lane strategies to allivate traffic jam and then restrain the growth of automobiles, is one of the promising alternatives.
In the past, researches in dedicated bus lane are mostly focused on capacity analysis, safety evaluation, travel time improvement, and service level assessment; however, there is a lack of estimation in the aspect of environmental benefits. In the sense of sustainable development of urban environment, it’s worthy to compare and estimate the effects of dedicated bus lane on energy consumption and pollution discharge, and on shifting private modes to bus system.
We establish estimation model to analyze energy consumption and pollution discharge with and without implementing dedicated bus lane. In addition to estimate the effects of dedicated bus lane on the fuel consumption and pollution discharge, we have also explored the environmental benefits of for whole city area with implementation of dedicated bus lane.
In the numberical analysis, we take Taipei as an example while different scenarios are assumed in terms of single bus route, bus corridor, and overall system. For the single bus route case, it was found that fuel efficiency can be increased to 20.87% while emissions of CO, HC, and NOx are reduced by 16.26%, 11.4%, and 8.22%, respectively. For the overall system level, although the benifts of dedicated bus lane are comparatively less due to existing high usage of automobiles, it is still found that daily fuel consumption of bus system can be reduced about 4.48% after implementing dedicated bus lane in Taipei. This implies a total amount of US$14 million saving in fuel cost per year. The emission reductions of CO, HC, and NOx are mearsured as 3.98%, 3.16%, and 2.59%, respectively. This research has also verified that the environmental benefits will be remarkably increased when the network of dedicated bus lane is expanded.
Subjects
能源效率
公車專用道
空氣污染
Energy Efficiency
Air Pollution
Dedicated Bus Lane
Type
thesis
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