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首页> 外文期刊>Transportation Research >(Unintended) Transport impacts of an energy-environment policy: The case of CNG conversion of vehicles in Dhaka
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(Unintended) Transport impacts of an energy-environment policy: The case of CNG conversion of vehicles in Dhaka

机译：（意外的）能源环境政策的交通影响：达卡的CNG车辆转换案例

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摘要

Motor vehicles are one of the major sources of air pollution in Dhaka, the capital of Bangladesh. The government took various policies to convert the petroleum vehicles on road to run on compressed natural gas (CNG), which allows both air quality improvements and energy security benefits. One of the market friendly policies to encourage the fuel switch was to increase the price differential between CNG and petrol and diesel. This has allowed a wide-scale adoption of CNG as the fuel of choice. However, several years into the policy, there is now a widespread belief among the policymakers that the CNG conversion may have increased car ownership and car travel due to their lower running costs, resulting in more congestion and a reversal of the strategy is on the cards. It is therefore important to test the hypothesis whether CNG conversion had genuinely increased car ownership and car travel in Dhaka city. This paper presents the results of a questionnaire survey and an econometric intervention analysis to understand the impact of CNG conversion on car ownership and car travel in Dhaka. Attention is also given to disentangle the self-selection and price-induced travel effects of CNG conversion. Results show that ownership did not increase, but travel of on-road vehicles increased due to the CNG policy. However, additional congestion costs are still around one half of the health benefits brought about by the policy.
机译：在孟加拉国首都达卡，汽车是主要的空气污染源之一。政府采取了各种政策，将道路上的石油车辆转换为压缩天然气（CNG），从而改善了空气质量并带来了能源安全益处。鼓励换燃料的市场友好政策之一是增加CNG与汽油和柴油之间的价格差。这使得CNG被广泛用作燃料。但是，在实施该政策的几年后，决策者们普遍认为，由于CNG转换的运行成本较低，因此CNG转换可能增加了汽车保有量和汽车出行次数，从而导致更多的交通拥堵，并且该策略已被逆转。因此，重要的是检验这一假设，即在达卡市，CNG转换是否确实增加了汽车拥有量和汽车旅行次数。本文介绍了问卷调查和计量经济干预分析的结果，以了解CNG转换对达卡汽车拥有量和汽车出行的影响。还应注意消除CNG转换的自我选择和价格导致的出行影响。结果表明，拥有量并没有增加，但是由于CNG政策，公路车辆的出行次数增加了。但是，额外的交通拥堵成本仍约为该政策带来的健康收益的一半。

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