how to make a concrete speed bump

Creating a concrete speed bump can help control traffic speed and improve safety in areas where speeding is a concern. Here’s how you can make a concrete speed bump:

Materials You’ll Need:

  1. Concrete Mix: You can use ready-mix concrete or mix it yourself with cement, sand, and aggregate.
  2. Rebar (optional): For added strength and durability, consider using rebar reinforcement.
  3. Wooden Forms: To shape and contain the concrete.
  4. Stakes: To secure the wooden forms in place.
  5. Level: To ensure the speed bump is even and level.
  6. Trowel: For smoothing the surface of the concrete.
  7. Concrete Float: For finishing and smoothing the concrete.
  8. Concrete Finish Broom: For adding texture to the surface for traction.
  9. Safety Gear: Wear safety glasses, gloves, and appropriate clothing when working with concrete.


  1. Plan and Mark the Location:
    • Determine the location for the speed bump and mark it using chalk or paint. Ensure that it’s in compliance with local regulations and safe for traffic.
  2. Prepare the Base:
    • Clear the area of any debris or vegetation. You may need to excavate the road surface to create a flat and level base.
  3. Create the Wooden Forms:
    • Build wooden forms to shape the speed bump. The forms should be the desired width and length of the speed bump and high enough to create the desired height. Secure the forms in place with stakes.
  4. Rebar (Optional):
    • If you’re using rebar for reinforcement, place it inside the forms at the desired height. Use wire ties to secure the rebar in a grid pattern.
  5. Mix and Pour the Concrete:
    • Mix the concrete according to the manufacturer’s instructions or your concrete mix recipe. It should have a thick but workable consistency. Pour the concrete into the forms.
  6. Level and Smooth the Concrete:
    • Use a level to ensure the concrete is even and level within the forms. Smooth the surface with a trowel.
  7. Add Texture:
    • While the concrete is still wet, use a concrete finish broom to add texture to the surface. This texture provides traction for vehicles and reduces slipperiness.
  8. Cure the Concrete:
    • Cover the freshly poured concrete with plastic sheeting or wet burlap to slow the drying process. Keep it moist for at least 24 to 48 hours to allow the concrete to cure properly.
  9. Remove Forms:
    • Once the concrete has fully cured (usually after a few days), carefully remove the wooden forms.
  10. Paint or Mark the Speed Bump (Optional):
    • To increase visibility, you can paint the speed bump with reflective paint or add road markings as necessary.
  11. Regular Maintenance:
    • Inspect the speed bump periodically and repair any damage or deterioration. Proper maintenance ensures its effectiveness and longevity.

Remember to follow local regulations and safety guidelines when installing speed bumps, and consider consulting with local authorities or a civil engineer to ensure compliance with traffic laws and safety standards.

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