The
Sleeping Policeman
A dynamic, revolutionary new sleeping policeman traffic hump actuated by a
The new traffic hump, the Dunlop Transcalm, is the brainchild of inventor
A mix of circumstances led Graham to come up with the idea. He was
So began a seven-year quest to perfect a retractable traffic hump that
responded to the type and speed of the vehicle crossing it.
Trials of the hump were carried out on the perimeter road at Norgren’s
Once the profile, molding technique and valve had been perfected, the team
encountered another problem. When the road surface has been dug up and
Ease of installation and maintenance are a further benefit of the system.
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