Which of the following actions was NOT taken by TEA-21?

The correct choice highlights that setting standards for roadside inspections was not a specific action taken by TEA-21. The Transportation Equity Act for the 21st Century (TEA-21), enacted in 1998, primarily focused on funding and enhancing surface transportation infrastructure, improving transportation safety, and increasing funding for various safety initiatives.

TEA-21 did indeed strengthen transportation safety programs by increasing financial support for initiatives aimed at reducing accidents and fatalities on roads, and similarly, it promoted safety belt usage and enforcement of .08 blood alcohol content standards, which are critical for ensuring driver safety and reducing traffic-related incidents. However, establishing the exact standards or guidelines for roadside inspections is typically handled through separate regulatory processes and legislation, rather than being a focus of TEA-21. Therefore, while safety measures and standards were accentuated, specific criteria for roadside inspections were not among the Act's documented initiatives.