Bridge operator's Forth Estuary Transport Authority (Feta) maintenance workers have installed several miles of ductwork to accommodate electrical wiring.

BBC: RELATED BBC SITES

Transport Scotland said the Forth Estuary Transport Authority (Feta), fully funded by the Scottish government, was liable for any compensation claims received.

BBC: Forth Road Bridge: Cable corrosion problems 'resolved'

"The Forth Road Bridge has provided 25 million vehicles every year with a connection between communities north and south of the Forth estuary whilst acting as a vital link in Scotland's transport network, " he said.

BBC: Forth Road Bridge