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Maryland EERPAT Pilot Example

Maryland's Greenhouse Gas Reduction Initiatives

The State of Maryland's Greenhouse Gas Emissions Reductions Act of 2009 requires the State to achieve a 25% reduction in Statewide GHG emissions from 2006 levels by 2020, and establishes a long term goal of reducing emissions 80% below 2006 levels by 2050. As required by the Act, the Maryland Department of Environment (MDE) developed a Statewide GHG reduction plan that outlined a suite of GHG reduction programs to achieve the reduction target. The Maryland Department of Transportation (MDOT) is the lead agency on several of GHG emission reduction policies related to transportation technologies, public transportation, and pricing initiatives. MDOT used EERPAT to further analyze the emission reduction potential of the strategies and programs outlined in the Statewide GHG reduction plan, as well as to analyze the synergies between those strategies.

Examples Policies Evaluated in EERPAT

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Cash for

Maryland is considering options to incentivize new car purchases and fleet vehicle turnovers. This policy scenario assumes 5 percent of vehicle fleet turns over every five years.

EERPAT Results

GHG 2020


GHG 2050


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Parking Fees & Travel
Demand Management

Maryland explored opportunities to strengthen its existing Travel Demand Management programs. One policy scenario assumes a 50% increase in parking fees and an expansion of participation in employer-
based TDM programs to include 25% of all employees.

EERPAT Results

GHG 2020


GHG 2050


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Smart Growth
& Land Use

Local governments in Maryland are working to encourage compact land use patterns to reduce travel distances between homes, jobs, and other destinations. In this scenario, 43% of the state’s population lives in urban mixed areas by 2030, increasing to 48% by 2050.

EERPAT Results

GHG 2020


GHG 2050


graph that shows the difference in time between the baseline EERPAT Forecast and the trajectory for achieving GHG targets which illustrates the need for additional policies and reductions to achieve GHG target

Impact of Potential Strategies Through 2020

In addition to testing individual policies, MDOT also used EERPAT to model the GHG emissions reduction levels that could be achieved through combining various policy strategies.

Planned Federal light duty and heavy duty fuel ecomony standards will “bend the curve,” in terms of reducing GHG emissions over time, although total on-road GHG emissions are expect to increase marginally by 2020.

State policies designed to reduce transportation GHG emissions may contribute to an absolute decrease in on-road GHGs.

Local plans and programs can help the state make further progress towards its GHG reduction goals.

Additional strategies will likely be necessary to help the state achieve its overall GHG emission targets.

Questions? Contact Diane Turchetta (202-493-0158) or John Davies (202-366-6039).

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