Speed Bumps UK: Regulations, Types, Dimensions and Costs — Complete Guide 2026

Last updated: May 2026. Written by the BarriersCo technical team — UK specialists in traffic calming, road safety equipment and speed management solutions.

Types of Speed Bumps and Traffic Calming Measures

The terms "speed bump," "speed hump," and "speed cushion" are often used interchangeably — but they are distinct products with different dimensions, applications, and legal frameworks. Choosing the wrong type is not just ineffective; on a public highway, it can be illegal.

Speed Bumps (Flat-Top)

A speed bump is a raised area across the full width of a road or private carriageway, typically 75–100mm high with an abrupt vertical rise profile. They reduce vehicle speeds to 5–10 mph — any faster is uncomfortable for occupants. Speed bumps are the most aggressive form of traffic calming.

• Height: 75mm or 100mm (private land); strictly regulated on public roads
• Suitable for: Car parks, private roads, industrial estates, factory yards
• Not permitted on: Public highways in the UK without a Traffic Regulation Order (TRO)
• Effect on emergency vehicles: Significant delay — ambulances must slow to near walking pace

Speed Humps (Round Profile)

Speed humps have a rounded, sinusoidal profile — they rise and fall gradually over a longer distance (typically 3.7m in the UK). They are designed to limit speeds to 15–20 mph, allowing emergency vehicles to pass more comfortably than over sharp speed bumps.

• UK specification: The Highways (Road Humps) Regulations 1999 define the permitted profile, height (25–100mm), and spacing for public highways
• Permitted on public roads: Yes, subject to TRO and statutory consultation
• Spacing: Regulations require humps to be placed no closer than 15m and no further than 100m apart in a series

Speed Cushions

Speed cushions are a modified hump — narrow raised sections that span only part of the road width, allowing wide-track emergency vehicles (ambulances, fire engines) to straddle the cushions with their wider axle widths while forcing cars to slow over them.

• Width: Typically 1.5–1.8m (narrower than the lane)
• Used for: Bus routes and emergency vehicle routes where full-width humps are impractical
• Limitation: Motorcycles and cyclists can also pass to the side of cushions without slowing — a known safety concern

Raised Junctions and Raised Crossings (Flat-Top Humps)

Entire junction surfaces or pedestrian crossings raised to pavement level. These are increasingly specified in urban realm schemes, shared spaces, and 20 mph zones to visually and physically prioritise pedestrians.

Speed Tables

Flat-top humps with a plateau, used at pedestrian crossing points. The flat top extends for a minimum of 6m under UK regulations, providing a level platform for pedestrians and cyclists. Often combined with zebra or pelican crossing markings.

Rubber Speed Bumps (Modular)

Modular rubber speed bumps are the most commonly purchased product from BarriersCo. They are pre-fabricated sections (typically 500mm wide modules) that bolt together across a carriageway and are fixed to the surface with anchor bolts. Unlike asphalt humps, they can be installed and removed without specialist plant, making them ideal for private roads, car parks, industrial estates, and temporary installations.

• Available heights: 50mm (standard) and 75mm (aggressive)
• Module widths: 500mm (half width), available as full-width kits including end caps and fixings
• Colours: Black/yellow alternating (most visible), all-black, all-yellow
• Suitable for: Vehicles up to 44 tonnes (HGV rated products)

UK Regulations for Speed Bumps

Public Highways

Speed humps on public roads in England and Wales are governed by the Highways (Road Humps) Regulations 1999 (SI 1999/1025), made under the Road Traffic Regulation Act 1984 and the Road Humps Act 1996. Key requirements:

• A Traffic Regulation Order (TRO) or Road Hump Order is required — local councils must consult with emergency services, bus operators, and the public
• Humps must be illuminated or marked with retroreflective material and advance warning signs (triangular warning sign with hump symbol)
• They must be lit at night if they are within 50m of a street lamp
• The profile must comply with Schedule 2 of the Regulations (sinusoidal, flat-top, or combination)
• Speed bumps (abrupt profile) are not permitted on public highways — only speed humps with approved profiles are lawful

Private Land

On private land (car parks, factory sites, private roads, retail parks), there is no statutory requirement to follow the Road Humps Regulations. However, the following still apply:

• Highway Code: If the private road has public access, the Highway Code's general duty of care applies
• Health and Safety at Work Act 1974: Employers must ensure their sites are safe — inadequately signed speed bumps that cause accidents could result in liability
• Signing: Best practice requires advance warning signs and yellow hazard paint markings on all speed bumps, regardless of whether they are on public or private land

Scotland

Road humps in Scotland are governed by the Road Humps (Scotland) Regulations 1998, with broadly similar requirements to England and Wales.

Rubber vs Plastic vs Asphalt Speed Bumps

Speed Bump Dimensions and Specifications

Standard Rubber Speed Bump Dimensions (Private Land)

• Height options: 50mm or 75mm
• Length (carriageway depth): Typically 300–500mm
• Width (module): 500mm per module; kits assembled to full carriageway width
• End caps: Tapered sections at each end; mandatory for vehicle safety
• Fixings: 10–12mm anchor bolts per module (concrete anchors or self-drilling into tarmac)

Highway Speed Hump Dimensions (Regulations 1999)

• Height: 25mm minimum, 100mm maximum (most commonly 75mm)
• Length: 900mm minimum (flat-top section); overall ramp length varies by profile
• Width: Extends to within 300mm of the kerb on both sides
• Profile: Must conform to the sinusoidal, flat-top, or combination profiles in Schedule 2 of the 1999 Regulations

Which Type Should You Use?

Private Car Park or Industrial Estate

Rubber or HDPE modular speed bump, 50mm height. Simple bolt-down installation, no specialist plant, can be repositioned if traffic flows change. Include end caps and yellow hazard markings.

School Zone (Public Road)

Speed cushions or flat-top humps — requires a Traffic Regulation Order from the local council. Cushions are preferred on bus routes. Always engage the council's traffic engineering team. Lead time from TRO consultation to installation: typically 6–18 months.

Residential Road (Public)

Speed humps (sinusoidal profile) at 75mm height, spaced 50–80m apart. Contact your local highway authority — residents typically petition for humps via the council's Local Area Committee or equivalent.

Warehouse Yard or Loading Area

Rubber speed bump at 50mm, HGV-rated. Specify products tested to 44-tonne axle loads. Install at yard entrances and near pedestrian crossing points.

Retail Park or Supermarket Car Park

50mm rubber or HDPE bump — visible colour (black/yellow) for pedestrian safety. Space at entry/exit lanes and at pedestrian walkway crossings.

How to Install Rubber Speed Bumps: Step-by-Step

1. Measure the carriageway width — calculate how many 500mm modules plus end caps are needed
2. Mark out the position — use chalk line; ensure placement is perpendicular to the direction of travel
3. Check for services — use a cable avoidance tool (CAT scanner) before drilling; no drill point should be within 300mm of a known service
4. Drill anchor holes — typically 12mm diameter, 100mm deep for standard tarmac or concrete; use a SDS drill with concrete bit
5. Insert anchor bolts — resin or mechanical expansion anchors; follow the manufacturer's torque specification
6. Position modules and end caps — align and bolt down from end caps inward
7. Apply warning markings — yellow hazard paint or pre-formed thermoplastic markings around the bump perimeter
8. Install advance warning signs — triangular warning sign with "road hump" symbol, minimum 50m in advance in each direction

Browse our full range of speed bumps available for next-day delivery across the UK, including rubber, HDPE, and full installation kits with fixings.

Speed Bump Costs in the UK: 2026 Guide

Frequently Asked Questions — Speed Bumps UK

Are speed bumps legal on my private road?

Yes. On private roads and land, you are not bound by the Highways (Road Humps) Regulations 1999. You can install speed bumps of any height without a Traffic Regulation Order. However, you should still sign them clearly, use end caps, and ensure they are visible — inadequate marking could create liability if a vehicle is damaged or a driver injured.

Can I put a speed bump on a public road?

Not without a formal Traffic Regulation Order (TRO) from your local highway authority. Unauthorised speed bumps on the public highway are illegal and can result in the authority requiring you to remove them at your cost. Contact your council's traffic engineering team to initiate the TRO process.

What height speed bump do I need?

For private car parks and low-speed sites: 50mm is the standard — effective at reducing speeds to 10–15 mph without causing excessive discomfort or vehicle damage. For more aggressive traffic calming or higher-speed approaches: 75mm. On the public highway, speed humps must be between 25mm and 100mm per the 1999 Regulations.

Do rubber speed bumps damage vehicles?

When correctly installed with tapered end caps and approached at appropriate speed (under 10 mph for 75mm bumps, 15 mph for 50mm), rubber speed bumps do not damage vehicles. Problems occur when end caps are missing (creating an abrupt vertical edge), the bump is installed on a bend (causing vehicles to approach at an angle), or drivers approach at excessive speed. Always include end caps in your specification.

How long do rubber speed bumps last?

Quality recycled rubber speed bumps typically last 10–20 years in normal use. Factors affecting lifespan include: UV exposure (surface degradation), HGV frequency (mechanical wear), fixing integrity (loose modules accelerate wear), and cleaning regimes (pressure washing is fine; solvent-based cleaners can degrade rubber). Inspect annually and retighten fixings.

Do I need planning permission for a speed bump?

On private land, planning permission is not usually required for speed bumps as they are considered temporary or minor engineering operations. On the public highway, a TRO is required (which is a separate legal process from planning permission). If the installation involves permanent works such as drainage changes or is within a conservation area, consult your LPA.

What signs are required with a speed bump?

On the public highway: triangular warning sign (road hump symbol, diagram 557 of the Traffic Signs Regulations and General Directions 2016), advance warning at 50m minimum. On private land: best practice is to use the same warning signs plus yellow hazard markings painted on the road surface. The warning sign is not legally mandated on private land but is strongly recommended to avoid liability.

Are speed bumps bad for emergency vehicles?

Traditional abrupt-profile speed bumps significantly delay emergency vehicles — studies have shown ambulances can be delayed by 1–2 minutes per hump in an urban area. This is why speed cushions (which emergency vehicles can straddle) are preferred on emergency vehicle routes, and why the TRO process for public roads requires consultation with emergency services. On private land, consider speed cushions if ambulance access is a concern.