Which of the following was NOT a purpose of TEA-21?

Answer: C — Promote 0.10% blood alcohol concentration standards

The correct answer highlights that promoting 0.10% blood alcohol concentration standards was not an objective of the Transportation Equity Act for the 21st Century (TEA-21). TEA-21 primarily focused on funding for highways, public transit, and safety improvements while also investing in innovative programs and research, such as intelligent transportation systems and performance-based activities. Although promoting safety in transportation was crucial to TEA-21, the specific standard for blood alcohol concentration was more closely associated with other legislative efforts aimed at reducing impaired driving. These efforts existed separately and were not a central thrust of the TEA-21 initiatives. This distinction emphasizes the act's broader goals regarding transportation infrastructure and technology advancements rather than targeting specific legal thresholds for alcohol consumption.