The A814 at Finnart is expected to be closed for several days after a landslide in storms which caused havoc last night (Wednesday).
Snow, rain and high winds battered the Clyde coast once again, and forecasters have warned that disruption will continue until Sunday.
Several roads were closed on Wednesday night, with gales adding to problem caused by earlier snowfalls.
And at one point Cove and Kilcreggan were effectively cut off, as the Peaton Hill and MoD road to Coulport were both closed and there were chaotic scenes on the B833 Mill Brae.
Some drivers waited more than an hour before an Argyll and Bute Council snowplough cleared a path – many cars had been abandoned on the hill, forcing an emergency ambulance to zigzag between them in icy conditions.
Community first responders were also in action, with one 4×4 vehicle on a callout and another checking roads and liaising with ambulance control.
A council spokesperson said: “If drivers have no option but to abandon their vehicles, they should try to pull over to the side of the road in the direction of travel, leaving room for others, including emergency vehicles, to pass by.
“Drivers who are stuck and have to leave their cars should contact Police Scotland on 101 to let them know where the car is.”
Met Office warnings of snow and ice are in force until midday on Saturday, while SEPA is again warning of possible flooding at high tide between 6pm and 9pm tonight.
The landslide which has blocked the Loch Longside road is said to be ‘significant’, the council spokesperson added: “The road is closed and likely to remain so for the next few days.
“A full assessment will be carried out when weather permits and in the meantime motorists should use the A817 Haul Road and A82 diversion route. We will provide more information as soon as we can.”
The Haul Road is currently open again after being closed by snow earlier in the week; on Wednesday night and Thursday morning several routes were blocked by flooding or snow, including the A82 near Dumbarton and West Clyde Street in Helensburgh.
The Gourock to Kilcreggan ferry was cancelled all day on Thursday, with winds gusting up to 49mph being cited, but Argyll Ferries sailings to Dunoon resumed in late afternoon.
Most bus services ran on time, although double decker buses were not used on the Kilcreggan to Hermitage Academy route.
Scotrail cancelled all trains from Helensburgh but they are expected to resume from around 6pm today (Thursday).