How to Choose the Right Speed Bump for Your Parking Lot

A speed bump costs less than $50 per meter to buy. A parking-lot lawsuit from an ambulance-scraping-oil-pan incident starts at $30,000. Choose the wrong bump and you either fail to slow traffic (defeating the point) or damage every vehicle that crosses it. This guide walks through exactly what to look for.

Step 1: Speed Bump vs Speed Hump — Not the Same Thing

Buyers use these terms interchangeably, but engineers don't. Get this right first:

Feature	Speed Bump	Speed Hump
Height	75-100 mm	50-75 mm
Width (travel direction)	150-300 mm	300-900 mm
Target speed	5-15 km/h	15-30 km/h
Where to use	Private lots, garages, alleys	School zones, residential streets, campuses
Emergency vehicle compatible	No — will scrape	Yes — designed for it

If fire trucks, ambulances or delivery vehicles cross your area, use a speed hump, not a bump. Full stop.

Step 2: Choose the Material

Three real options — plus one "don't do this":

Vulcanized Rubber (Recommended for most B2B use)

• Pros: Weather-proof (-40°C to +80°C), UV-stable, absorbs vibration (quiet), lasts 8-12 years, easy to relocate
• Cons: Costs more upfront than plastic ($40-80/m for standard 500×900×50 mm)
• Best for: Parking lots, warehouses, industrial gates, private roads with any recurring traffic

Plastic (HDPE)

• Pros: Cheapest upfront ($15-30/m), light to install
• Cons: Cracks in cold climates, UV-degrades in 2-3 years, hollow-drum "thump" is loud, tends to come loose
• Best for: Temporary event use, indoor low-speed areas

Concrete

• Pros: Zero maintenance, lasts 20+ years
• Cons: Permanent — you can never move it. Expensive to install ($150-300/m poured), damages vehicles harder than rubber, illegal in many private jurisdictions where you don't own the road surface
• Best for: Public roads, permanent infrastructure only

Step 3: Get the Size Right

Standard modular units are 500 mm long (in the driving direction that vehicles cross). Chain multiple units to span your lane width:

Lane width	Units needed	Include end caps?
3.0 m (single lane)	3 × middle units	2 end caps (both sides)
3.5 m	3-4 × middle units	2 end caps
6.0 m (two-way)	6 × middle units	2 end caps
Full-width road	Count meters ÷ 0.5	2 end caps

End caps have one flat end and one sloped end — critical for a professional look and to avoid a torn-off first module.

Step 4: Confirm the Mounting

Rubber humps come pre-drilled for expansion bolts. Standard is 4 anchor holes per 500×900 mm unit. Check that your supplier ships the correct bolts (M12 × 100 mm expansion bolts for asphalt; M12 × 150 mm chemical anchors for concrete). Ask specifically — many suppliers ship the hump without bolts, then you're stuck sourcing them locally.

Step 5: Reflective vs Non-Reflective

The yellow stripes on rubber humps come in three grades:

1. Painted stripes — cheapest, fade in 12 months
2. Glass-bead reflective — good for headlight visibility, lasts 3-5 years, small price bump
3. HIP prismatic reflective — brightest, lasts 8+ years, best for outdoor 24/7 use

For any outdoor installation where night traffic exists, glass-bead is the minimum you should accept.

Frequently Asked Questions

What is the difference between a speed bump and a speed hump?

A speed bump is short and abrupt and targets about 5 mph, so it suits car parks and private drives. A speed hump is wider front to back with a gentler profile and targets 10 to 15 mph, which is what you want on a through road or an access route used by emergency vehicles.

What size speed bump do I need for a car park?

Match the height to the target speed rather than buying the tallest unit available. A modular rubber bump around 50 mm high slows cars to walking pace without grounding low vehicles; going taller mainly generates undercarriage damage complaints.

Can rubber speed bumps be installed on asphalt?

Yes, but the fastener has to match the substrate. Asphalt is soft and will not hold a concrete expansion anchor, so use long spikes designed for asphalt and re-torque after the first week of traffic once the units have bedded in.

Step 6: Get a Realistic Quote

Ballpark factory-direct pricing from China for our standard 500×900×50 mm rubber hump with glass-bead reflective:

• MOQ 100 pcs: $22-28 per unit FOB
• 500 pcs: $18-22 per unit FOB
• 1,000+ pcs: $15-18 per unit FOB

Add ~$500-800 for a full 20' container of freight (about 400 units). Compare that to $40-80/m from a local reseller and the math is obvious past 200 pcs.