The Comber Greenway cycle route is to be extended through east Belfast to link up with the Titanic Quarter.
The new route will run through Ballymacarrett to the new £90m Titanic visitor attraction.
As part of the extension an old access road into the former docks will be reopened.
The project has been funded by Sustrans, the Big Lottery Fund, Belfast City Council, Roads Service, Belfast Harbour and Translink.
Lord Mayor Niall O'Donnaghaile said the route will benefit the local community.
"This is an invaluable project which will greatly enhance access to the Titanic Quarter for the people of east Belfast, and beyond, whether they are going to work there, visit the new Titanic Belfast centre or study at Belfast Met," he said.
"At the council, we are committed not only to opening up the city and making it accessible to all, but also to encouraging people to adopt healthier lifestyles, through walking and cycling, for example.
"This scheme - which I am delighted to say is only one of many being developed across the city - fulfils both of those objectives and the council is delighted to support it."