Ramped up security at Rosyth Dockyard caused travel chaos for commuters on Wednesday morning.
Delays of almost two hours were reported due to security checks at the Fife yard in the wake of the Manchester terrorist attack.
As the UK’s threat level was raised to critical, the dockyard, where two Royal Navy aircraft carriers are being assembled, was among numerous locations where enhanced measures were put in place.
Stagecoach East Scotland confirmed that heavy delays were due to checks at the dockyard and a breakdown on the Forth Road Bridge.
Services including the number seven and X54 were held up or cancelled as traffic came to a standstill.
Queensferry Road from Pitreavie to Rosyth Railway Station and Kings Road, Rosyth, were heavily congested.
Staff at Rosyth Dockyard had go through rigorous security checks as they arrived for work, causing huge tailbacks for those travelling in Fife to Dunfermline and Edinburgh.
Stagecoach East Scotland confirmed on Twitter: “We are heavily delayed at the moment. This is due to the FRB breakdown and the high security checks at Rosyth Dockyard.”
Scott Hutchinson tweeted: “Gridlock in Dunfermline/Rosyth this morning due to security checks at docks I believe.”
HebrideanRenovation posted: “If anyone is near the Rosyth dockyard this morning brace yourselves for a long wait, we’ve already got folk held up more than an hour.
“The roads are pretty well at a standstill – all vehicles going in and out of the dockyard being searched – huge impact on the traffic.”
Dunfermline South councillor Fay Sinclair used her Facebook page to warn commuters there may be more misery to come.
She said: “Stagecoach have confirmed due to heightened security at Rosyth dockyard the number 19 bus was running around 1hr 45mins late this morning.
“However, they are warning this may continue for the rest of the week due to the nature of the security in place and it could change again at quick pace.”