High occupancy vehicle (HOV) lanes help optimize roadway efficiency by encouraging carpooling and reducing single-occupant vehicle traffic. This R3-13a standard sign provides critical information for drivers by clearly defining the specific times when HOV lane restrictions are in effect. Constructed with reflective aluminum standard punched blanks, the sign offers maximum visibility and durability. Its high intensity and diamond grade reflectivity ensures clear communication for drivers during both daytime and nighttime conditions, meeting all DOT and MUTCD regulatory standards. By guiding drivers on HOV lane usage, this sign contributes to smoother traffic flow and enhanced road safety for all commuters.