Several such tools are now available to the FreedomCAR and Fuel Partnership. The applicability of each tool is summarized in Figure 2-1. Some of them have been developed, at least in part, by the Partnership and some have been developed outside. This set of systems analysis tools is now providing useful technical capabilities at the vehicle and fuel system levels. Increasingly, it is also providing capabilities at the implementation, impact, and policy levels.

The Phase 1 report reviewed the status of the available analysis tools and how they were then being used. The committee that wrote that report made recommendations in three areas:

• Continuing broad assessments to guide future research priorities and national transportation energy policy.

• Developing and using models to better understand consumer behavior during market transitions to new vehicle technologies and fuels.

FIGURE 2-1 Models and analysis type matrix. DTI, Directed Technologies, Inc.; EEA, Energy & Environmental Analysis, Inc.; GREET, Greenhouse Gases, Regulated Emissions and Energy Use in Transportation; HyDive, Hydrogen Dynamic Infrastructure and Vehicle Evolution; HyDRA, Hydrogen Demand and Resource Analysis; HyDS, Hydrogen Deployment System; HyTrans, Hydrogen Transition; H2A, Hydrogen Technology Analysis; MARKAL, Market Analysis; NEMS, National Energy Modeling System; NREL, National Renewable Energy Laboratory; PSAT, Powertrain Systems Analysis Toolkit. SOURCE: F. Joseck and L. Slezak, DOE, Systems Analysis Effort, Presentation to the committee on April 25, 2007.