Melbourne's CityLink and part of the Tullamarine Freeway will be upgraded under an $850 million plan that will create 700 jobs.

The project, unveiled by the Victorian government on Monday, will widen the freeway to boost capacity by a third.Premier Denis Napthine says the plan will cut travel times between the West Gate Freeway and Melbourne Airport by 16 minutes in peak times.The project will start in 2015 and is due…