The Forth Road Bridge (FRB) is due to reopen for walkers, cyclists and public transport users.
The bridge will offer dedicated lanes for buses and taxis between the M9 near Newbridge and Halbeath in Fife, officials said.
Routes for walking and cycling across the bridge will also be opened, giving pedestrians and bikers a cleaner and quieter crossing, free from car traffic.
The routes are all set to open on Thursday.
We spoke to the Transport Minister @HumzaYousaf whilst on the A9000 Forth Road Bridge this morning with an update on the opening of the Public Transport Link tomorrow.
More details on the operation of the link can be found ?https://t.co/dm3zDwa7ji@transcotland pic.twitter.com/gKW2ljEiUl
— Traffic Scotland (@trafficscotland) January 31, 2018
The new bridge for cars and other vehicles across the Firth of Forth – the £1.35 billion Queensferry Crossing – was opened by the Queen in September.
It is officially becoming a motorway, meaning some forms of transport cannot use the crossing and require the alternative route across the water.
“The original decision allowed us to substantially reduce the cost of the overall project by retaining the FRB, therefore reducing the size and cost of the new bridge.”
This morning the @forthroadbridge officially opened to people on foot, bike & public transport. Lovely to be there & celebrate with our active travel partners! pic.twitter.com/ZTadzIHh5d
— Cycling UK Scotland (@CyclingUKScot) January 31, 2018
John Lauder, national director of Sustrans Scotland, said: “The reopening of the Forth Road Bridge as a sustainable transport corridor is a hugely positive development that sets a precedent within Scotland and acts as an example to the rest of the UK.”