Speed Bumps For SaleA Vanguard Industrial Protection brand

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Guide · Dimensions

How high is a speed bump?

Short answer

A speed bump is 2 to 4 inches high with 12 to 15 inches of travel length. The two commercial standards we stock are 2.4 in tall with 13.8 in of travel (trucks and forklifts, ≤ 6 mph) and 3 in tall with 15 in of travel (cars, ≤ 10 mph). Width is built to the lane from 39 in and 20 in modules plus two 10 in end caps.

Close-up of a bolted-down rubber speed bump module showing height and anchor hardware

Dimension table by device

Height alone does not set the speed — the ratio of height to length does. This is why a 3 in bump slows traffic to 10 mph while a 3 in hump only slows it to 20 mph.

Device	Height	Length (travel)	Target speed	Where it belongs
Speed bump (2.4 in HD)	2.4 in	13.8 in	≤ 6 mph	Truck yards, docks
Speed bump (3 in modular)	3 in	15 in	≤ 10 mph	Parking lots, HOAs
Speed hump	3–4 in	10–14 ft	15–20 mph	Public streets
Speed table	3–4 in	22 ft+ flat top	25–30 mph	Crossings, collectors
Speed cushion	3–4 in	6–7 ft, split pads	15–20 mph	Fire routes, buses
Rumble strip	< 1 in	Ridge band	Alert only	Approaches

Dimensions are the commercial US standards; our two stocked profiles are the first two rows.

Sizing the width to your lane

center modules = (lane width in inches − 20 in) ÷ module length

A 12 ft lane is 144 in: subtract 20 in for the two end caps, leaving 124 in of body — three 39 in modules plus one 20 in module. A 24 ft two-way entrance takes roughly double.

Clearance: will it scrape a low car?

At 2.4–3 in with a ramped profile, a stock sedan clears at walking speed and a lowered car clears at a crawl. Where clearance is the main concern — a premium residential driveway or a dealership lot — the 2.4 in profile is the safer specification, and it is also the one rated for 176,000 lb axle loads.

Buying terms

In stock in the USA — LTL freight to all 48 contiguous states.
Purchase orders accepted from companies, 3PLs, HOAs, school districts and cities.
Pallet and container pricing past about 10 lanes.
Anchor hardware and end caps included; 5-year commercial warranty.
Quote with landed freight answered within 24 business hours.

Frequently asked

How high is a speed bump?

A speed bump is 2 to 4 inches high. The two standard commercial profiles are 2.4 in, used where trucks and forklifts cross, and 3 in, used for car traffic. Anything taller than about 4 in scrapes low-clearance vehicles and is not used on drivable lanes.

How long is a speed bump in the direction of travel?

12 to 15 inches. The 2.4 in heavy-duty profile has 13.8 in of travel and the 3 in modular profile has 15 in. That short footprint is what forces 5–10 mph; a speed hump is 10–14 ft long and only forces 15–20 mph.

How wide is a speed bump?

As wide as the lane. Modular kits build to any width: 39 in and 20 in center modules plus two 10 in end caps. A standard 12 ft lane is 144 in, so it takes 124 in of body plus the two end caps.

What height should I choose for my lot?

3 in for cars, vans and delivery trucks at a 10 mph target. 2.4 in when tractor-trailers, yard trucks or forklifts cross, because the shallower rise plus the internal steel plate protects axles, masts and loads at a 6 mph target.

Is there a legal height limit for speed bumps?

Not on private property — parking lots, HOA private roads, campuses and yards. Public streets follow the city's traffic-calming standard and MUTCD signage, and most cities specify humps of 3–4 in over 10–14 ft rather than bumps.

What do these sizes cost?

$260–$520 per 12 ft lane for the 3 in modular profile and $360–$660 for the 2.4 in heavy-duty profile, in materials with anchors included, plus LTL freight to your ZIP.

Free download

Spec sheet & price guide (PDF)

Both profiles, dimensions, load rating, price per 12 ft lane and what we need to quote freight. One field — no phone call required.

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Next step

Both profiles side by side

2.4 in heavy-duty and 3 in modular, with full specs.

Bump vs hump

Which device your speed target and road type calls for.

Cost per lane

$260–$660 per 12 ft lane, plus what install runs.

2.4" heavy-duty & 3" modular — in stock in the USA, ships nationwide.