Lorry crash on A82 causes long delays at Loch Lomond
Temporary traffic lights were set up to allow the road to remain open.
Drivers can expect long delays northbound on the A82 after a lorry jackknifed just south of Tarbet.
Temporary traffic lights have been set up until the HGV can be recovered, which isn't expected until tomorrow.
The vehicle went into a verge at Stuckgowan at 6am.
But Traffic Scotland say both lanes of the road will have to be closed in order to pull the HGV out of the verge.
Police Scotland have requested the temporary traffic lights to allow the road to remain open during the Easter Bank Holiday.
Police Scotland say they will close the road at midnight to allow for recovery of the lorry.
CalMac Ferry are advising passengers to allow extra time to travel.
Eddie Ross, from BEAR Scotland, said: "Trunk road safety is our top priority, so we've made the area around the HGV safe for road users to get past until full recovery can be arranged.
"We also understand that roads are busier due to the Bank Holiday weekend, so rather than close the road to recover the vehicle which will have a large impact to motorists, Police Scotland have arranged for temporary traffic lights to remain in place instead.
"We thank motorists for their patience in advance, and encourage them to plan their journey in advance by checking Traffic Scotland for updates."