The A43 southbound is blocked due to a serious accident before the A5.
The A43 linking the M40 and M1 remains closed in Northamptonshire to allow traffic to access the British Grand Prix at Silverstone.
Diversions are in place via Stony Stratford and Buckingham.
From M1 J15 drivers should use A508 and A422 and A421, rejoining the A43 just South of Brackley.
A43 closed in both directions at Tiffield. There are delays due to an earlier accident. A lorry was involved, so recovery work is taking place around St Johns Road.
Queueing traffic due to a motor-sport event on A43 in both directions at Silverstone Race Track, congestion on A43 southbound to A413 (Towcester).
Reports of A43 both ways blocked, queueing traffic due to accident between A5 and Blisworth.Affecting traffic between Silverstone and M1 J15A
A43 Stamford Road both ways blocked, queueing traffic due to accident near A6116 Brigstock Road / Long Croft Road.
The A43 northbound is closed due to accident involving three vehicles at St Johns Road.
There is no through traffic allowed on the A43 in both directions between (A421 - Brackley) and (A413 - Towcester) from today (July 6) to Sunday July 8, due to British Grand Prix sports event.
Only race spectators will be able to use this section of the A43. A one way system will be in place for traffic heading to Silverstone in the morning and away from Silverstone in the afternoon.
Diversions are in place - southbound traffic will be diverted to junction 15 of the M1, along the A508, the A422 and A421, rejoining the A43 south of Brackley.
Traffic northbound will leave the A43 at the A421, along the A422 and the A508 to junction 15 of the M1.