I don't think they 'picked' the day, as such. Seems after finding one steelwork defect under the road deck earlier in the week (which resulted in lane closures) they then found quite a few more. BBC say 8 separate faults.
Being suggested now that it could be a fairly long closure, weeks rather than days.
Well they could have decided to close it from tomorrow instead, giving people the chance to get organised, couldn't they?
And if the problems are so severe that they had no choice but to order an instant closure, it begs a lot of questions about the inspection regime.
It states on BBC Travel News that Rail services in Scotland, VTEC, Scotrail and XC disrupted due to closure of the Forth ROAD Bridge !!!
That could well be the case if everyone is trying to get onto the rail services instead - though I do suspect the same as you; some reporter has their bridges mixed up and has put 2 + 2 together to make 709347683767.
Well if even half the people who normally drive over the bridge are all trying to cram on to trains from Fife into Edinburgh, with the result beng extended dwell times at each station, then it probably is disrupting train services. And looking at Inverkeitihing there has been a fair degree of late running all morning, not much more than five minutes or six minutes in most cases, but hardly right-time performance.
Scotrail's Live Travel Updates heading is
Edinburgh/Fife Circle - Severe Disruption and if you want the 11.21 from Glenrothes to Edinburgh, forget it through most of Fife, as the train is being cut back to start at Inverkeithing, presumably to shift people who have driven down the M90 that far and now expect Scotrail to convey them into Edinburgh. Scotrail is also warning of possible delays and alterations for the rest of the on services between Edinburgh Dundee, Aberdeen and inverness.
So perhaps the BBC is right after all...