The best speed hump for a residential street is the one that matches the street's traffic volume, design speed, fire-access status, and climate. There is no universal winner. After installing more than 200 speed humps across Oregon's I-5 corridor since 2020, our crew defaults to a 12-foot asphalt parabolic profile for permanent residential applications and pivots to other profiles when site conditions push back. Below are six profiles ranked by frequency of correct fit on residential streets.
Selection criteria
Six factors drive the right pick. Use them as a checklist before choosing a profile:
- Posted speed. 25 mph streets favor 12-foot parabolic; 20 mph streets accept 12-foot or shorter.
- Bus or fire-access status. If yes, step up to a speed table or speed cushion.
- Bicycle traffic. Sinusoidal profile is gentler on bikes than parabolic.
- Snow removal. Modular rubber removable for plowing in snow-belt cities.
- Aesthetic match. Brick-inlay or stamped finishes for historic neighborhoods.
- Permanence horizon. Asphalt for 15+ year horizons; rubber for shorter.
1. Asphalt parabolic, 12 ft (the default)
The default residential hump profile. ITE Traffic Calming Manual Chapter 3 recommends the parabolic shape because the smooth curve delivers consistent slowing without the abrupt edges that flat-top profiles create. Cars at 15 to 20 mph cross comfortably; cars above 25 mph feel a sharp suspension articulation that discourages speeding.
Best for: Standard residential collectors and local streets with no buses or fire-priority traffic. Cost: $1,500 to $5,000 installed. Lifespan: 15 to 25 years.
2. Asphalt sinusoidal, 14 ft (cycle-friendly)
The sinusoidal profile (a smooth sine-curve cross-section) is gentler on bicycles than parabolic. The Federal Highway Administration's Traffic Calming ePrimer documents better cyclist comfort with sinusoidal humps on streets that double as designated bike routes (FHWA ePrimer). The slowing effect on cars is similar to parabolic.
Best for: Streets that are part of a city neighborhood greenway or cycling network (Portland's bike-greenway system, Eugene's neighborhood greenways). Cost: $1,800 to $5,500 installed. Lifespan: 15 to 25 years.
3. Modular rubber, 12 ft (removable)
The dominant rubber product in the true-hump length range. Modular sections bolt together end-to-end across the full lane width. Designed for streets that need seasonal removal (snow plowing) or for pilot installs before committing to permanent asphalt geometry.
Best for: High-elevation Oregon cities (Bend, Sisters, La Pine) and traffic-calming pilot programs. Cost: $2,000 to $4,500 installed. Lifespan: 5 to 8 years.
4. Brick-inlay flat-top, 22 ft (architectural)
Technically a speed table by length (22 ft), but commonly grouped with humps in the residential context. The brick or paver inlay creates a visual cue that matches historic neighborhoods. Portland's Northwest District and Eugene's Whiteaker have heavy use of brick-inlay tables.
Best for: Historic districts, design-review-board sites, HOA neighborhoods with strong aesthetic standards. Cost: $9,000 to $25,000 installed. Lifespan: 25 to 40 years.
5. Asphalt flat-top, 22 ft (transit-friendly)
A speed table in form, often grouped with humps when the street needs to slow cars but allow buses and fire trucks to maintain speed. The 22-foot length and flat profile lets long-wheelbase vehicles ride entirely on the raised section. See the speed hump vs speed table decision guide for full criteria.
Best for: Bus routes (TriMet, Lane Transit, Cherriots service streets) and fire primary-access roads. Cost: $5,000 to $15,000 installed. Lifespan: 15 to 25 years.
6. Seasonal/portable rubber, 12 ft (pilot programs)
Lightweight modular units anchored with surface bolts (not embedded anchors). Removable in 30 to 60 minutes per unit. Used by cities running 6-month traffic-calming pilots before deciding whether to install permanent infrastructure.
Best for: City pilot programs, summer-only use cases (school streets when school is out), event-period calming. Cost: $1,800 to $3,500 installed. Lifespan: 3 to 6 years (with annual rotation).
How to pick between them
Walk the site at peak traffic with a stopwatch and a measuring wheel. Three measurements:
- Free-flow vehicle speed. If the 85th percentile is above 30 mph, the device alone may not be enough; consider pairing with chicanes or curb extensions.
- Lane width. Wide lanes encourage speed; narrower lanes (10 to 11 ft) help the hump's slowing work harder.
- Sight distance. A hump on a curve or crest needs more advance warning than a hump on a tangent. Plan signage 200 ft upstream minimum.
For a Beaverton greenway install in 2025, our crew used profile #2 (sinusoidal) because the street is part of the Beaverton-Hillsboro neighborhood greenway network. The cyclist-friendly profile drove the choice; cost was secondary.
What it costs
Industry Baseline Range
| Profile | Installed Cost | Lifespan |
|---|---|---|
| Asphalt parabolic, 12 ft | $1,500 to $5,000 | 15 to 25 years |
| Asphalt sinusoidal, 14 ft | $1,800 to $5,500 | 15 to 25 years |
| Modular rubber, 12 ft | $2,000 to $4,500 | 5 to 8 years |
| Brick-inlay flat-top, 22 ft | $9,000 to $25,000 | 25 to 40 years |
| Asphalt flat-top, 22 ft | $5,000 to $15,000 | 15 to 25 years |
| Seasonal/portable rubber, 12 ft | $1,800 to $3,500 | 3 to 6 years |
Current market reality
Pricing in 2026 sits at the upper end of these ranges due to hot-mix asphalt cost increases (roughly 18% over 2024 to 2025) and tight traffic-control labor in Oregon. Multi-unit projects (3+ humps on the same street) typically save 15 to 25% on per-unit pricing.
Frequently asked questions
What is the most common speed hump profile in Oregon? 12-foot asphalt parabolic. It is the ITE-recommended default and matches Oregon city traffic-calming program specs in Portland, Salem, Eugene, Beaverton, and most other I-5 corridor cities.
Is a sinusoidal hump worth the upcharge? On dedicated bike-route streets, yes. The cyclist-comfort gain is real and documented. On general residential streets without designated bike traffic, the parabolic profile is fine.
Can rubber speed humps survive Oregon winters? In the I-5 corridor, yes. In high-elevation cities (Bend, Sisters), seasonal removal during snowplow months extends life and avoids damage from plow blades.
How does Cojo decide which profile to recommend? We walk the site, measure free-flow speeds, identify transit and fire-access status, and check the city's traffic-calming program spec. The profile follows the data; cost is the tiebreaker.
Should I install one hump or multiple? Multiple. A single hump produces local slowing but drivers re-accelerate. ITE recommends 250 to 500 foot spacing on residential streets for sustained speed reduction.
Get a Site-Specific Recommendation
Cojo installs all six profiles across Oregon. We coordinate with city traffic engineers, transit agencies, and fire marshals to spec the right device. Contact Cojo for a quote, or see our speed hump cost guide for full pricing.