Highway sign boards are traffic control devices used to guide, warn, regulate, and inform road users. They are generally classified into four main categories: 1. Regulatory Signs These indicate traffic laws and regulations that must be followed. Stop Give Way (Yield) Speed Limit No Entry No U-Turn One Way 🔴 Usually circular with red borders, except special signs like STOP. 2. Warning Signs These alert drivers about potential hazards ahead. Sharp Curve Steep Descent School Ahead Pedestrian Crossing Slippery Road Road Narrows ⚠️ Usually triangular with a red border. 3. Informatory Signs These provide useful information and directions. Hospital Fuel Station Parking Restaurant Bus Stop Hotel 🔵 Usually rectangular or square with blue backgrounds. 4. Guide and Direction Signs These help drivers navigate routes and destinations. Route Numbers Distance Markers Exit Signs City/Town Directions Highway Junction Information 🟢 Often green on national highways and expressways. Common Highway Signs 🚫 No Entry 🛑 Stop ⚠️ Curve Ahead ⛽ Fuel Station 🏥 Hospital 🅿️ Parking 🚸 Pedestrian Crossing 🛣️ Expressway Ahead If you need sign boards for a highway project, presentation, drawing, or design, I can also provide a complete illustrated chart or generate example highway signboard images.