Unauthorised speed breakers that scrape the undercarriage of modern low-floor automobiles will soon give way to well-designed structures on city roads.

Following several complaints from owners of luxury cars, the Chennai Corporation has decided to remove all speed breakers that exceed permissible dimensions. The city will have only three types of speed breakers that permit vehicles to cross at speeds of 25, 15and 10 km/hr.

A five-member committee will decide on designing speed breakers at zonal level. Another committee will clear proposals for speed breakers on bus routes.