The Forth Replacement Crossing project has scooped the greatest contribution to Scotland award.
The £1.35 billion project, with the Queensferry Crossing at its heart, took the title at this year’s Saltire infrastructure awards.
Glasgow’s Shieldhall tunnel picked up the infrastructure award.
The annual awards recognise excellence and innovation in civil engineering and celebrate its contribution to Scotland’s quality of life.
The awards attracted 12 entries and included submissions for harbours, bridges, tunnels, motorways, distilleries, railways, public spaces and flood protection schemes.
The state-of-the-art 1.7 mile Queensferry Crossing – the longest three-tower cable-stayed bridge in the world – safeguards a vital transport corridor and enhances the Forth alongside the Forth Bridge and Forth Road Bridge.
The judges recognised its importance in creating resilience in Scotland’s transport network and the professional excellence displayed in all aspects of its design and construction.
It boasts several firsts including the world’s longest continuous underwater concrete pour and longest free-standing cantilevers.
Public finance and digital economy minister Kate Forbes said: “I am of course delighted that the newest Scottish icon, the Queensferry Crossing has been recognised for its contribution to Scotland.
“It is delivering extensive benefits to users and communities while safeguarding vital transport connections, helping families and businesses right across the country.”
Judging panel convenor Ainslie McLaughlin said: “Our awards showcase the incredible feats of civil engineering and the unsung heroes behind them.”
She added the scale and complexity faced in delivering the Forth Replacement Crossing and Shieldhall tunnel projects made them very worthy winners but all the entries showcased ingenuity, expertise and dedication.
Saltire Society president Professor Sally Mapstone said: “Civil engineers design, build and maintain the vital infrastructure on which our quality of life depends and these projects show Scotland at its best.”
