What's the difference between a speed cushion and a speed hump?

A speed hump is a continuous parabolic raised section across the full lane width. A speed cushion has wheel-track gaps that let wide-axle vehicles (fire trucks, ambulances) straddle the cushion at speed. Both slow passenger cars; only the cushion preserves emergency-vehicle access. Cushions are the standard pick on fire-access streets.

How wide should the wheel-track gap be on a speed cushion?

Most modular cushions spec 1.85-meter centers, which fits typical U.S. fire-apparatus engines. Sites with frequent ladder-truck calls should spec 2.0 to 2.10-meter centers. Always coordinate with your local fire department before ordering -- the gap dimension is the engineering decision that defines whether the cushion preserves apparatus access.

Are speed cushions effective at slowing cars?

Yes. ITE Traffic Calming Manual data shows speed cushions reduce 85th-percentile speeds by 4 to 9 mph on residential streets. Effectiveness is similar to speed humps but without the emergency-vehicle slowdown. Cojo's Salem installs have shown 8 to 10 mph speed reductions at 60-day post-install monitoring.

Can speed cushions be removed?

Modular rubber cushions can be unbolted and removed in 1 to 2 hours per section. Monolithic asphalt and concrete cushions require saw-cut and patch -- $1,500 to $3,500 per cushion to remove. For sites where removability matters (snow country, temporary installs, planned grade changes), spec modular rubber from the start.

Do speed cushions damage cars?

Properly installed cushions at the standard 3 to 4-inch height do not damage passenger cars at intended approach speeds (15 to 20 mph). Damage typically occurs only at excessive speed (>25 mph), with vehicles whose ground clearance is below 4 inches, or with cushions installed at non-standard heights. The Federal Highway Administration's Traffic Calming ePrimer covers passenger comfort thresholds.

5 Best Speed Cushions for 2026 Traffic Calming

The best speed cushion in 2026 depends on three things: does the street need to keep emergency-vehicle access open, what's the traffic mix, and is the install permanent? Cushions differ from bumps and humps in one defining way — they have wheel-track gaps that let wide-axle vehicles (fire trucks, ambulances) straddle at speed while slowing passenger cars. The ITE Traffic Calming Manual treats cushions as the standard for streets that need calming AND emergency-vehicle access on the same surface.

Below: five cushion types ranked by use case, what each one does well, and the spec details that matter when you're picking. Pairs with best speed cushions for fire-access streets and the speed cushions and tables Oregon statewide guide.

What Makes a Speed Cushion the Right Pick?

Five factors decide cushion fit:

Wheel-track gap width -- must match local fire-apparatus axle width (1.7 to 2.0 meters typical for U.S. fire trucks)
Traffic-load rating -- typical car, school bus, transit bus, fire truck loads
Modular vs monolithic -- modular rubber installs and removes; monolithic asphalt is permanent
Mounting -- bolt-down rubber, asphalt cast-in-place, or precast set
Surface durability -- snow-removal exposure, chain damage, freeze-thaw cycling

The CISA Vehicle Ramming Mitigation guide is silent on cushions (they are traffic-calming, not security devices), so reference the ITE Traffic Calming Manual and the Federal Highway Administration's Traffic Calming ePrimer for design guidance.

5 Best Speed Cushions for 2026

1. Modular Rubber Speed Cushion (Best Overall)

Best for: Residential traffic-calming with emergency-vehicle access requirements

A factory-manufactured rubber cushion in 4-section or 6-section assemblies with engineered wheel-track gaps. Bolts to existing asphalt or concrete with anchor hardware. Removable for snow operations or grade changes.

Specs: 6 to 8 feet wide x 6 feet long x 3 to 3.5 inches tall. Wheel-track gaps at 1.85-meter centers. Hot-dip galvanized hardware. Yellow-and-black factory color.

Cost: $2,500 to $5,500 installed each.

Pros: Removable. Modular replacement of damaged sections. Predictable factory dimensions. 5 to 8-year service life. Cons: Higher upfront cost than asphalt. Anchor maintenance every 2 to 4 years.

2. Monolithic Asphalt Speed Cushion (Best Permanent Install)

Best for: Permanent residential or commercial traffic-calming with no plowing requirements

A continuous asphalt cushion poured in place, with wheel-track gaps formed during the pour. Custom dimensions to match local fire-apparatus axle width.

Specs: Custom width and length to match site, 3 to 4 inches tall, 4,000 psi-equivalent hot-mix asphalt with chevron paint and reflectors.

Cost: $3,500 to $7,000 installed each.

Pros: Lowest per-year cost (10 to 15-year life). Custom dimensions. Aesthetic match with surrounding pavement. Cons: Permanent -- removal requires saw-cut and patch. Not removable for snow operations.

3. Brick-Inlay Decorative Speed Cushion (Best for Aesthetic Districts)

Best for: Historic districts, plaza-edge streets, neighborhood-character priority

An asphalt or concrete base cushion with brick or paver inlay on the surface for visual cohesion with surrounding hardscape.

Specs: Custom base + 6 to 8-inch brick inlay. Wheel-track gaps maintained. Mortar-set or sand-set bricks.

Cost: $5,500 to $12,000 installed each.

Pros: Visual integration with district aesthetic. Long lifespan if maintained. Adds character. Cons: Highest cost in the cushion family. Mortar replacement every 5 to 10 years. Snow plow damage to bricks.

4. Removable Rubber Speed Cushion (Best for Snow Country)

Best for: Bend, La Pine, mountain corridors -- anywhere snow plowing happens 30+ days per winter

A modular rubber cushion designed to come up before snow season and reinstall in spring. Recessed anchor sleeves remain in place; cushion sections lift off and store for the season.

Specs: Same dimensions as modular rubber (Item #1) but with quick-release anchor hardware. Recessed sleeves cast flush to pavement.

Cost: $3,200 to $6,500 installed each.

Pros: Survives unlimited plow seasons. Modular replacement. Same emergency-access function as fixed cushions during use. Cons: Storage logistics for the off-season. Higher initial cost than fixed rubber. Sleeve drainage matters.

5. Heavy-Duty Industrial Speed Cushion (Best for Loading-Yard Use)

Best for: Industrial sites with mixed forklift, semi-truck, and emergency-vehicle traffic

A reinforced cushion engineered for repeated heavy-vehicle loads. Steel-reinforced rubber or concrete with engineered wheel-track gaps for both fire-apparatus and forklift wheels.

Specs: 8 to 10-inch wide tracks, 3 to 3.5 inches tall, steel-plate reinforced or 5,000 psi concrete with #5 rebar.

Cost: $4,500 to $9,500 installed each.

Pros: Survives forklift and semi-truck repeat loads. Long industrial-grade lifespan. Custom track geometry. Cons: Higher cost than residential-grade. Custom engineering review for loads above standard fire-apparatus.

Selection Criteria: Which Cushion Wins for Your Site?

Site Profile	Recommended Cushion
Residential street, fire-access requirement	Modular rubber (#1)
Permanent traffic-calming, no plowing	Monolithic asphalt (#2)
Historic or character district	Brick-inlay decorative (#3)
Bend / Sisters / mountain corridor	Removable rubber (#4)
Industrial or distribution loading yard	Heavy-duty industrial (#5)

What's the Wheel-Track Gap Spec?

This is the engineering decision that defines a cushion. The gap must be wide enough that the local fire department's apparatus can straddle the cushion at speed without bouncing.

Typical U.S. fire-apparatus axle widths:

Light pumper / engine: 1.85 to 2.05 meters axle width
Aerial ladder truck: 2.10 to 2.20 meters axle width
Tower truck: 2.20 to 2.30 meters axle width

Most modular cushions are spec'd at 1.85-meter centers, which works for engines but bounces ladder trucks. Sites that host frequent ladder-truck calls should spec 2.0 to 2.10-meter centers. Coordinate with your local fire department before ordering.

Real Cojo Cushion Install: Salem Fire-Access Road, Q2 2025

We installed 3 modular rubber speed cushions on a Salem residential fire-access road that had complaints of cut-through traffic but a fire-marshal-mandated apparatus access path. Spec'd at 1.85-meter wheel-track gaps, 6-foot wide x 6-foot long sections, hot-dip galvanized anchor hardware, factory yellow-and-black with reflective banding.

Per-cushion installed cost averaged $3,400 across the 3-cushion run. Salem Fire confirmed acceptable apparatus straddle at the post-install field test. Resident speed monitoring at 60 days showed average speeds dropped from 28 mph to 19 mph through the corridor.

Compliance and Codes

ITE Traffic Calming Manual Chapter 3 -- speed cushion design guidance
FHWA Traffic Calming ePrimer -- federal traffic-calming reference
NFPA 1141 -- fire protection in planned developments
International Fire Code 503 -- fire apparatus access requirements
ADA / U.S. Access Board -- pedestrian accessible-route considerations
Local jurisdiction traffic-calming program -- approval process

Always verify current requirements with your local fire department, public works, and jurisdiction. This article reflects 2026 specifications.

Get a Speed Cushion Installation Quote

Cojo installs modular rubber, monolithic asphalt, and removable speed cushions across the Oregon I-5 corridor. We coordinate wheel-track-gap dimensions with local fire departments, install on shoulder-season schedules, and stripe and sign on the same mobilization. Contact Cojo for a cushion quote.