Final answer:
The question is about the number of people involved in motor vehicle accidents on U.S. roadways in 2009, which relates to road safety and accident statistics. Data reveals a high number of fatal crashes and the prevalent use of personal vehicles for commuting, underlining the risks associated with road travel.
Step-by-step explanation:
In 2009, approximately 2.2 million people were involved in motor vehicle accidents on the roadways of the United States. The data from Table 1.19 indicates that there was a significant number of fatal motor vehicle traffic crashes during the period from 1994-2011, which emphasizes the importance of road safety.
Considering the statistic that approximately 86.5 percent of Americans commute to work by car, truck, or van, the risk of being on the road is omnipresent. Furthermore, with a high percentage of Americans driving alone, the chances of motor vehicle injuries or fatalities increase.
The U.S. Census Bureau data also highlights the proportion of driver dummies who could have suffered head injuries, underscoring the potential severity of accidents. Lastly, the additional context that the U.S. adds about 1.6 million drivers per year suggests that road congestion and accident rates may continue to climb if proper safety measures are not enforced.