How will you know if you are on track?

We have intermediate targets of 30% improvement of new car fuel economy, worldwide, by 2020 and 50% by 2030.  Hitting the new car target for 2030 will ensure we hit the 50% target for the entire stock of cars by 2050.

As part of the initiative, we will undertake a new, on-going effort to collect data on vehicle efficiency from countries around the world on a regular basis.  We will track and publically report on efficiency trends and the uptake of technologies.  We will compare how these trends compare with the trendlines needed to meet our 50-by-50 targets.  

We will further develop these targets/ make them more concrete and precise, at the regional and sub-regional / national level as we obtain better data, especially for the developing world. Given the large differences around the world in fuel economy, we need to develop appropriate regional strategies and assist countries with their national strategies. As these are implemented, we will begin to track their effectiveness over time.