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'Screaming' traffic cones unveiled in Birmingham

14 May 2013 Last updated at 13:25 BST

"Intelligent" traffic cones are being unveiled on the M6 in the West Midlands in a bid to improve road safety.

The cones are similar to regular ones but have a yellow top and look like a lighthouse.

The in-built alarm "screams" when the cone is struck, alerting workers to the possible danger of a vehicle coming too close to them.

Phil Mackie reports.