The M4 is closed near Swindon following a coach and lorry crash.
The crash happened at around 4.30am on 18 September between Junction 14 Hungerford and 15 for Swindon East.
National Highways say the westbound carriageway is expected to be closed until around 3pm.
Thames Valley Police said the coach driver, who had six passengers on board at the time, was injured.
Officers remain at the scene investigating.
What diversion route is in place? - Drivers advised to follow hollow square signs
Leave the M4 at Jct 14. At the rbt, take the first exit and join the A338
Follow for approx 3 miles At the A4 mini roundabout, turn right onto the A4 towards Hungerford avoiding Hungerford town centre
After a short distance to the next rbt take the 2nd exit into Charnham Park
Turn right onto the B4192 and follow for approx 13 miles through Aldbourne to the A419 roundabout
Take the first exit and join the A419, continue to rejoin the M4 westbound at Jct 15
3:45pm - delays until 7pm
Two of the three lanes remain closed on the westbound carriageway of the M4.
National Highways said: "Normal traffic conditions are expected between 7pm and 7.15pm. There are currently delays of 1 hour against expected traffic."
11:45am - one lane reopen
Thames Valley Police confirm that one lane has now reopened.
A statement reads: "The westbound carriageway of the M4 between Junction 14 and 15 was closed after a collision between a coach and a HGV at about 4.25am."One lane has now reopened. The other two lanes will reopen once the vehicles have been recovered."