The Transport Ministry, the Ministry of International Trade and Industry and the Environment Agency have drawn up the final draft of a radical plan that calls for a maximum 50 percent cut in local car tax on environmentally friendly vehicles, government sources said Saturday.

The three government agencies will try to ensure that their proposed tax incentive, which is intended to promote the proliferation of so-called eco cars, is included in the government's annual tax reform to be finalized later this month.

In a proposal put forward during the summer, the agencies had called for a cut of between 10 percent and 20 percent in local car tax for three years.