Innovative traffic calming that helps save lives

A responsive traffic calming device that alters its firmness based on the velocity of the vehicle passing over it.

TransCalm - Responsive Speed Control

Fast and efficient bolt down installation

Encourages controlled, consistent driving speeds

Significantly reduces the risk of vehicle damage

TransCalm - Responsive Speed Control

Highly visible - Quick & easy to install - Transferable


TransCalm - The speed bump has evolved

Since their introduction in the 1980’s solid road humps, in their various guises, have been the primary tool available to traffic engineers in their fight to reduce vehicle speeds around vulnerable areas.

Solid road humps do work, but they also raise considerable safety and cost issues such as potential injuries to vehicle occupants, adverse effect on busses, life threatening delays to emergency services as well as thousands of pounds worth of damage each year to vehicles passing over them.

We have developed a whole new concept in speed control, fully compliant, replacing both the traditional solid speed hump and many other traffic calming devices.

The road hump has evolved…

Introducing the TransCalm responsive speed control system. Designed for use on public roads, reducing vehicle speeds to 20mph and below, perfect for around schools and residential areas.
The TransCalm is a totally unique, patented, solution that alters its firmness based on the velocity of the vehicle passing over it. Compliant drivers and emergency vehicles travel softer, saving lives, reducing response times, and minimising potential vehicle damage.

Highly visible - Quick & easy to install - Transferable

  • Helps to save lives and educate drivers
  • Encourages controlled, consistent driving speeds
  • Fast and efficient bolt down installation
  • No external power required

  • Significantly reduces the risk of vehicle damage
  • Built-in override for emergency service vehicles
  • Smoother ride for public transport
  • Reduces noise and vehicle emissions
  • Blended end pieces conducive for cyclists and drainage

How does it work?

Air - The TransCalm is constructed from a high performance rubber compound containing a pneumatic cylinder, fitted with a patented valve that operates at a pre-set safe speed. The valve is open for drivers under normal safe use, allowing the cylinder to deflate, reducing the firmness of the unit. If the safe speed is exceeded, the valve closes, retaining air in the cylinder, creating a hump so that the vehicle occupants experience progressive discomfort in proportion to the speed of the vehicle passing over the unit.


Dimensions - 3358mm long x 900mm wide
Height - 70mm (uncompressed) / 45mm (compressed)
Weight approx. - 130kgs
Markings - Reflective (to suit traffic direction)
Construction - Bolt-down rubber modules

Click here to find out more about the first installation.

The TransCalm is a responsive traffic calming device that alters its firmness based on the velocity of the vehicle passing over it

The TransCalm is designed to save lives, and can be installed with confidence on emergency routes. The valve in the TransCalm contains an override system for larger emergency vehicles travelling at speed, causing the valve to immediately deflate the air cylinder, reducing the obstruction, saving time and lives.

Reduce injuries and improve journey times on bus routes, thanks to the unique design of the TransCalm. Buses travelling at, or below the prescribed ‘safe speed’ will experience a smoother crossing when compared to conventional road humps. This removes the significant problems associated with negotiating solid humps, minimising the discomfort and risk of injury for passengers using public transport.

The installation of solid road humps cause a significant increase in noise and air pollution. A transport research laboratory study conducted emissions test on roads with a 75 meter solid road hump spacing found the resulting stop/start pattern of driving:

Increasing hydro carbonates emissions by 70 - 100%

Increased CO2 emissions by 50 - 60%

Increased CO emissions by 70 - 80%

The TransCalm will help improve air quality in towns and cities by promoting a change in the pattern of driving that causes these increases.

The TransCalm takes the “bump” out of speed bump, reducing its firmness for compliant drivers and making it much quieter for local residents. The rubber construction also reduces the level of vibration, which is often a problem with conventional speed humps, and other solid traffic calming devices.

The TransCalm project started in 2001, with the purpose of saving lives by reducing the speed of traffic in vulnerable areas. The ethos behind the project was to engineer an innovative traffic calming solution in the simplest, most reliable way possible. The innovation was, and is, using proven, tested technologies in a radically new way.

The original concept was developed by the TransCalm team comprising of: Pell Frischmann, Dunlop GRG Holdings Ltd, with additional research and testing carried out by scientists from Downing College Cambridge and The University of Manchester.

The University of Manchester developed a computer model to predict the performance of road humps in terms of their discomfort within varying design parameters.
The model considered the interaction of:
• Materials used in the construction of the hump
• Physical hump profile; size, shape, gradient etc
• Fluid mechanics
• Air flow
• Vehicle weight, wheelbase, suspension, tyres and wheels
Prototypes of the TransCalm were installed at a variety of test sites:
• 4 year trial in the Corporation of London
• 5 year trial at Stockley Park, near Heathrow Airport
The trials were very successful, yielding very positive feedback, proving the technology worked, and the TransCalm would be a very welcomed tool for making our roads safer.

In 2013, Signature Ltd joined the TransCalm team, working closely with the Pell Frischmann to develop the original TransCalm design in to transferable, bolt down version. The new TransCalm is built using proven pneumatic valve technology, developed into an easy to install, low maintenance, bolt down traffic calming solution.

Test site at the University of Manchester

Test sites at for the initial prototype are located at Stockley Park Business Estate, the Corporation of London and Wigan Council.

Mark TilleyHead of Infrastructure at Wigan Council
We installed TransCalm speed cushions to replace existing units as part of safer routes to school scheme. There has been a significant reduction in traffic speeds and volumes following the installation of the new TransCalm units The school and local residents fully supported the installation of the TransCalm speed cushions and they have definitely had a real impact on road safety in the area, with a marked reduction in traffic speeds and volumes, encouraging more children to walk and cycle on the school journey

The TransCalm was piloted successfully over a four-year period by the Corporation of London.

Joe WeissHighways and Transport Director
The Rolls Royce of Road Humps! Not one complaint was made about the unit from either motorist, pedestrian or cyclists.

A further pilot has been carried out over a five years period at the prestigious Stockley Business Park near Heathrow Airport, which hosts clients including Apple, BP and IBM. The park management is delighted with the effect that TransCalm has had on the traffic in this very busy location.

Mike Perks
We are extremely pleased with the performance of the TransCalm traffic calming units that have been in use on Stockley Park for several years. We are committed to providing a safe and environmentally friendly environment for our occupiers. The units encourage drivers to travel at safe speeds with none of the nuisance and discomfort associated with solid humps. They have been very effective in reducing car speeds around the Park and very importantly allow buses a much improved comfort when crossing the units in comparison to the solid humps we had previously