No timeframe has been given for when a road may reopen after it was damaged in a landslide.
Kent County Council (KCC) has been assessing the damage to the route, but was unable to say when cars and pedestrians will be able to use it again.
A spokesman said: “KCC, working with other authorities, is assessing damage caused to the highway as a result of a landslip in the Road of Remembrance, Folkestone.
“The cause is unknown, and the road remains closed to protect the public.
“There is currently no timeframe for re-opening.”
Metal fencing and yellow bollards have been put on the road to stop traffic.
Danny Griggs passed the incident at 1am on Saturday on the way home from the pub.
He told KentOnline: “I saw a car had stopped just ahead of us and I didn’t realise why it had until I actually got up close.
“The obstruction covered both lanes and it’s definitely a landslide, not just a fallen tree, as there is soil everywhere.
“It’ll need quite a big clean-up, it’s the main road to get from the harbour to the town.”
A police spokesman confirmed it was reported to the force and it is being dealt with by Kent Highways.
It comes after another route in the town was closed due to a landslide.
The popular Cow Path at Leas Coastal Park was blocked by debris during storm Ciaran three months ago and will stay shut until spring.
Folkestone & Hythe District Council say they are working with consultants to “stabilise” the footpath.