What type of signs should you watch for in the median that indicate left lane restrictions for car pool vehicles?

In highway signage, diamond-shaped signs are specifically used to convey information about lane restrictions, including those pertaining to car pool or high-occupancy vehicle (HOV) lanes. These signs are designed to capture attention quickly and effectively communicate important regulatory information regarding lane usage. For car pool vehicles, the diamond sign typically indicates that certain lanes are reserved for vehicles with a minimum number of occupants. Understanding and recognizing these signs helps drivers comply with the regulations, promoting safety and efficient traffic flow, while also encouraging carpooling to reduce congestion and environmental impact.

Triangle signs usually indicate yield situations, pennant signs signify no passing zones, and round signs are generally used for railroad crossings, which do not pertain to lane restrictions for car pool vehicles. This distinction reinforces the importance of recognizing the specific meanings of different sign shapes while driving.