Final answer:
Express lanes signs indicate designated lanes for specific types of vehicles or drivers willing to pay a toll for faster travel. They help reduce congestion and provide more efficient travel options.
Step-by-step explanation:
The 'express lanes' sign is typically used in transportation systems to indicate a designated lane that is reserved for specific types of vehicles or for drivers willing to pay a toll for faster travel. These lanes are often found on highways or toll roads, and they are meant to reduce congestion and provide more efficient travel options.
For example, in many cities, there are express lanes that are only open to vehicles with multiple occupants or to drivers who have purchased a special pass. These lanes often have fewer vehicles, allowing for faster and smoother travel.
In some cases, express lanes may also be used for emergency vehicles, such as ambulances and firetrucks, to quickly reach their destinations without getting stuck in traffic.