Sandling Interchange

Sandling Interchange is junction 6 of the M20.

Routes (whole junction)

Route	To	Notes
M20	London	inner carriageways
M20	A20 Aylesford	outer carriageways to junction 5
M20	Ashford, Channel Tunnel, Dover
A229	(M2), Chatham, Blue Bell Hill
A229	Maidstone
	Sandling, Penenden Heath, Boxley, Bearstead	Sandling Lane
	Aylesford Village	Forstal Road. 7.5 tonne weight limit in 1 1/2 miles

Cobtree Roundabout

The northern roundabout at the junction

Routes

Route	To	Notes
M20	Ashford, Channel Tunnel, Dover
A229	(M2), Chatham, Blue Bell Hill
A229	London (M20), Maidstone, Aylesford	link between roundabouts
A229	Maidstone	underpass

The Running Horse Roundabout

The southern roundabout at the junction, named after a nearby pub

Routes

Route	To	Notes
M20	London
A229	Ashford, Channel Tnl (M20), Dover (M2), Chatham, Blue Bell Hill	link between roundabouts
A229	Maidstone
A229	(M2), Chatham	flyover
	Sandling, Penenden Heath, Boxley, Bearstead	Sandling Lane
	Aylesford Village	Forstal Road. 7.5 tonne weight limit in 1 1/2 miles

History

As opened, the junction was of a completely different layout

When opened in 1960 the junction was a parclo on the A20(M) with single carriageway, looped sliproads in the south-west and north-east corners, as is typical of an early motorway design.

It wasn't changed when the road became the M20, but eventually a new eastbound left-turn and a new roundabout at the end of the south-facing sliproads allowed for some minor changes. Further changes, in the early 1990s alongside motorway widening, saw the northern roundabout added with the A229 grade separated from both roundabouts, allowing the original ancient eastbound offslip to close.

Original Junction Routes

Route	To	Notes
M20	London, Aylesford
M20	Ashford, Dover
A229	(M2), Chatham, Blue Bell Hill
A229	Maidstone
A20(M)	London, Aylesford
A20(M)	Ashford, Dover