In a continuing effort to get the Taxi and Limousine Commission to turn green a little faster, the Bloomberg administration announced a new set of incentives for fleet owners with hybrid or other low-emission vehicles, the NY Times reports. Starting May 1st, taxi fleet owners can charge drivers $3 more per 12-hour shift for hybrid or clean diesel cabs. They will also be able to "penalize fleet owners by lowering the amount they can charge to lease cabs that use more fuel and pollute more, like the Ford Crown Victoria, the most common type of taxi." The new rule will decrease that charge by $4 per shift. While it would ultimately clean and green the streets of NYC, there are some opponents. A spokesman for the Metropolitan Taxicab Board of Trade called the plan "unconscionable," saying fleet owners bought their vehicles under the former lease cap. Currently of the 13,237 cabs in New York City, there are 2,019 hybrids and 12 clean diesel vehicles.