How do you build a speed bump on driveway?

To build a speed bump on your driveway, start by marking the desired location and dimensions, typically about 3 to 4 feet wide and 3 to 4 inches high. Excavate the area to create a foundation, then fill it with compacted gravel for stability. Next, use asphalt or concrete to form the bump, ensuring a smooth surface for vehicles. Finally, let it cure properly before use and consider adding reflective paint or signage for visibility.