What discovery did the City of Miami make when testing vehicles with modified power systems? The city learned that the vehicles made hundreds of stops per day, decreasing their efficiency over time.

The city learned that the vehicles made hundreds of stops per day, increasing their efficiency over time.

The city found that fuel consumption was reduced by 75 percent, and fuel economy improved by 43 percent.

The city found that fuel consumption was reduced by 43 percent, and fuel economy improved by 75 percent.