One lane has now been opened on the M2 after a 15ft sinkhole appeared in the central reservation.
The motorway had been closed since Tuesday but the hard shoulder was opened this morning at 6am for motorists to use.
Pea-shingle is being used to fill the sinkhole, which appeared between Sittingbourne and Faversham.
The two main lanes are still shut and delays are to be expected.
A huge sinkhole on the M2 in north Kent means one of the south east's busiest roads remains shut this evening - more than 24 hours after it was first discovered. Highways surveyors at the scene say they have no idea when they can fully reopen the motorway.
It's meant long tailbacks and delays for drivers in the Faversham and Sittingbourne areas. Our reporter Nashreen Issa talks to Kevin Bown from the Highways Agency and Philip Gomm from the RAC Foundation.
A sinkhole which opened up on the M2 motorway in Kent has now got its own Twitter account.
The sinkhole opened up on the central reservation yesterday
Using the address @M2Sinkhole it describes itself as the bad boy of the M2. Bringing you all the inside info on the chaos I'm causing! Get the hole story here!
A sinkhole is the middle of the M2 in Kent is growing. New cracks have been spotted in the road. Originally it measured fifteen feet in depth. The motorway had to be shut yesterday between Sittingbourne and Faversham when it first appeared and diversions are still in place.
Engineers were joined on site by the emergency services including Kent Fire & Rescue Service. Cameras have been and will continue to be used to investigate the extent and nature of the hole.
The site was closely monitored overnight, whilst equipment and materials are being organised and deployed to site ready for our contractors to start work as soon as it is safe to do so. A clearly signed diversion is in place via the A249, the M20, the A20, the A252, and the A251.
A section of the M2 in Kent remains closed between J5 and J6 in both directions this morning for safety reasons as work continues to investigate what caused a hole to open up in the central reservation yesterday. Lanes on the M2 will only be reopened to traffic as soon it is safe to do so.
Drivers heading to and from Dover are advised to use the M20. The Highways Agency and its contractors are working hard with partners, including the emergency services and Kent County Council to minimise disruption as much as possible.
The hole, between junction five for Sittingbourne and junction six for Faversham, is approximately five metres long, two metres wide, and about five metres deep (15x6.5x15ft) and was reported yesterday afternoon by Highways Agency contractors.
The Highways Agency have confirmed that he hole on the M2, in the central reservation between junctions 5 and 6, near Lynsted is approximately 15 feet in depth, not 50 feet (15 metres) as previously stated.
Their engineers are on site carrying out an investigation and this includes the cause of the hole.
A 15ft-deep sinkhole has opened in the central carriageway of the M2. The motorway is closed in both directions between junctions 5 and 6 - that's between Sittingbourne and Faversham.
The Highways Agency has diversions in place, but say there will be long tailbacks in both directions.