As introduced, urges department of transportation to study and report to the transportation committee of the house of representatives and transportation and safety committee of the senate on or before February 1, 2022, as to the overall impact of the utilization of HOV lanes on air quality, including any potential reductions in the gas emissions that are attributable to congestion reduction and the use of HOV lanes by ILEVs and LEEEVs resulting from the program; authorizes department to consult with the departments of revenue and environment and conservation in preparing this report. - Amends TCA Title 55, Chapter 8.