Diagnostic Test 13

Cities with higher median incomes tend to have lower emissions than cities with lower median incomes.

Within two years of implementation, peak-hour traffic volumes fell 18%, off-peak volumes rose 9%, and transit ridership increased 12%, while the registered vehicle mix showed no significant change.

Downwind suburbs recorded modest air-quality improvements during a windy spring following implementation.

National electric vehicle adoption increased steadily over the last decade.