For example, fuel excise rates do not substantially change the decision to drive in particular vehicles (to reduce road damage), in particular areas (to reduce noise pollution) or at particular times (to reduce congestion). Fuel excise levied for social or environmental objectives also leads to higher burdens on activities where there may be no costs on others. New technologies (such as 'etag' and the global positioning system) are increasing the viability of more efficient direct charging mechanisms.
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