A jury is today visiting the scene of a road collision in which a cyclist died last year.
Police have closed Tring Hill, from the junction with the A41 roundabouts, down to Stablebridge Road in Aston Clinton, to allow the visit as part of the trial involving the death of Mairead Boucherat.
The teaching assistant, from Hempstead Road, Kings Langley, died in the collision near to the junction with Upper Icknield Way on May 30 last year.
She was training for the London to Brighton cycle ride on June 21, in which she was raising money for the British Heart Foundation.
A spokesman for Thames Valley Police said the jury were due to visit the site at 10am, so it is expected the road closure will be lifted shortly.
Tracy Tripp, of Burnvale Place, Livingstone, West Lothian, has been charged with causing death by careless driving.
Her trial began on Monday (March 21) at Aylesbury Crown Court. .