H.R. 5321 — To amend title 23, United States Code, with respect to the special rule for low emission and energy efficient vehicles facilities, and for other purposes.

This section extends the period during which states may allow electric vehicles to use high-occupancy vehicle (HOV) lanes without meeting minimum occupancy requirements to December 31, 2026 (from September 30, 2025). It also directs the Secretary of Transportation to submit to Congress, not later than 180 days after the date of enactment, a report on the effectiveness of electric vehicle exemptions in reducing traffic congestion.