Kent Police say the A21 southbound carriageway is now partially open.
Diversions are still in place on the London bound carriageway at the junction with Pembury and drivers are advised to expect delays.
The death is not being treated as suspicious.
A woman has died after being found in the central reservation on the A21 Tonbridge bypass.
Emergency services were called just before 4.30am but despite the best efforts of paramedics, the woman was pronounced dead an hour later.
The road was closed in both directions between Morley's roundabout and Vauxhall roundabout causing long delays.
The A21 Northbound is blocked, and there is queueing traffic due to multi-vehicle accident at Church Lane between Lamberhurst and Flimwell in Kent.
There are reports of one lane closed and slow traffic because of a broken down car on the A21 Sevenoaks By-Pass northbound after the A225 / B245 / Morley's Road (Hildenborough / Sevenoaks turn off).
It's one of the busiest and most congested roads in the south east. Drivers and motoring groups have been calling for improvements to the A21 in Kent for decades. Today, the Government signalled it would look at the possibility of widening the route as Tom Savvides reports.
Roads Minister Mike Penning has given the go ahead for development work to start on the widening of the A21 in Kent. A section of the road was due to be turned into dual carriageway but the work was shelved in 2010 because of budget cuts.
The development work will focus on designing and consulting on proposals, along with progressing any necessary statutory processes.