A new underpass at the Raith Interchange in South Lanarkshire opened on Thursday morning after three years of construction.
The A725 underpass runs underneath the M74 motorway and is hoped to ease congestion by improving journey times for its 75,000 users by 15 minutes.
The advancements to the motorway came as part of a £500 million project by Scottish Roads Partnership (SRP) and began in February 2014.
Economy Secretary Keith Brown announced the opening on Thursday morning. He said: “The opening of the new underpass at Raith is a major and significant milestone in this massive transport infrastructure project.
“This investment will make a tangible difference to road users, alleviating the traffic congestion that has been a historic problem at the Raith.”
The aim of the project is to improve the A8 connecting Glasgow and Edinburgh, as well as making developing the M3, M74 and A725.
The underpass was met with a mixed response by commuters with some saying ‘they coasted through on their way to work’, while others still using the M74 said they were ‘queued up for miles’.
The opening comes before a section of the M8 at Baillieston closes on Friday for 10 weeks of works. Drivers will be moved to the new A8 at Bargeddie.