Work began in September 2011 at the southern end of the M90 with the project set to be completed by 2016.
The new Forth Road Bridge will join the road network at Ferrytoll on the Fife shore, where the existing Ferrytoll Intersection will be redesigned to form the junction between the approaches to both bridges.
The bridge, formally known as the Forth Replacement Crossing, acquired its new name in June last year following a public vote.
The search for a name saw 35,000 votes cast and more than 7,000 suggested names received.
Caledonia Bridge, Queensferry Crossing, St Margaret’s Crossing, the Firth of Forth Crossing and Saltire Crossing were among the alternative names considered.