But it is still unclear whether a route has been finalised for KanalIstanbul.

Turkey's deputy prime minister Ali Babacan has said the projectwill definitely go ahead, with plans afoot to reroute main transport routesthrough Thrace and to construct bridges for traffic passing over the waterway.

The idea was first announced in 2011 as a bid to cut shipping congestionthrough the city, with completion intended by 2023.

Preliminary