👉The Main Types Of Traffic Loads On A Highway

🚧1. Static Load

⏺This is the load from a vehicle when it is not moving or is moving very slowly.
🏷Example: a truck stopping on the road.
⏺It puts a constant pressure on the pavement.

🚧2. Dynamic Load

⏺This is the load from vehicles in motion.
⏺When a vehicle moves, the load increases because of acceleration, braking, bumps, and surface roughness.
⏺Dynamic load is higher than static load.

🚧3. Impact Load

⏺When a vehicle hits a bump, pothole, or uneven surface, an extra sudden force is applied on the pavement.
⏺This sudden force is called impact load and can damage weak pavement.

🚧4. Axle Load

⏺This is the load carried by each axle of a vehicle.
⏺Heavy trucks have multiple axles, and each axle transfers load to the pavement.
⏺High axle load = fast pavement damage.

🚧5. Wheel Load

⏺This is the load applied by each wheel of a vehicle.
⏺The pavement directly feels this wheel pressure on a small area.

🚧6. Repetitive Load (Load Repetition)

⏺Highways get millions of vehicles.
⏺Even if each load is small, repeated passing creates fatigue on the pavement.
⏺This is the main reason pavements crack over time.

🚧7. Braking and Acceleration Load

⏺When vehicles brake or accelerate, they apply horizontal (longitudinal) forces on the pavement.
⏺These forces can create rutting or surface skid marks.

🚧8. Lateral Load

⏺This occurs when vehicles turn or change lanes.
⏺Side forces act on the pavement and can cause pavement shoving or displacement.

🚧9. Environmental Load (Indirect Traffic Load)

⏺Temperature changes and moisture combined with traffic movement create extra stresses.
⏺Hot weather softens asphalt, and traffic loads cause rutting.

🚧10. Overload (Illegal Load)

⏺When trucks carry more weight than allowed, they create very high pavement stress.
⏺Even one overloaded truck can damage the pavement equal to thousands of normal cars.

@etconp