Where speed bumps make sense
Speed bumps are raised sections of pavement that force drivers to slow down in parking lots, townhome communities, school zones and private roads where people are walking.
Height, width and slope matter. A bump that is too abrupt damages cars and gets complaints, and one that blocks drainage creates a puddle. We build to the dimensions that fit the location and keep water moving.
Why Oahu Asphalt
- Built to spec
- Standard bumps or longer, gentler humps, sized for the speed you want.
- Quick installs
- Most jobs are done with little disruption to traffic.
- Visible and marked
- Reflective striping and optional signage so nobody is surprised.
- Drainage kept open
- Tapered ends or gaps so water still flows.
What the work includes
- Layout and prep
- Mark locations per the plan and clean the surface of dust and loose material.
- Asphalt placement
- Apply tack coat, place hot mix (typically 3 to 4 inches high and 12 to 24 inches wide), and shape with tapered sides.
- Compaction and finishing
- Compact and check height, alignment and transitions.
- Striping and marking
- After cooling, apply reflective paint, typically yellow, plus any arrows or signage.
- Cleanup
- Remove debris and equipment and reopen the lane.
How it goes
Site evaluation
We measure and decide placement and design with you.
Surface prep
Existing pavement is cleaned and readied.
Build
Asphalt is placed and shaped.
Stripe
Reflective markings go on once it has hardened.
Final check
Dimensions, markings and drainage are verified.
Recent speed bumps projects
Speed Bumps questions
How tall and wide is a standard speed bump?
Asphalt bumps are generally 3 to 4 inches high and 12 to 24 inches wide. Length and spacing depend on the location and the posted speed.
Will a speed bump block drainage?
Not if it is designed right. Tapered edges or drainage gaps keep water flowing and prevent ponding.
How long do asphalt speed bumps last?
With proper installation and upkeep, 7 to 10 years or longer depending on traffic.
Do they need maintenance?
Some. Traffic and weather can crack or ravel the edges over time. Seal coating, patching and re-striping keep them in shape.
Can a speed bump be removed or moved?
Yes. Asphalt bumps can be milled or cut out and rebuilt elsewhere.
Asphalt or rubber speed bumps?
Asphalt lasts longer, stays put and becomes part of the pavement. Rubber is quicker to bolt down but tends to shift, wear faster and need more upkeep.
Where we work
We provide speed bumps across Oahu, including Honolulu, Kapolei, Ewa Beach, Pearl City, Aiea, Kaneohe, Kailua, Mililani, Wahiawa, North Shore and everywhere in between.