The Infrastructure Minister Nichola Mallon has reaffirmed her belief that the new road between Derry and Dungiven should largely be completed this year.
The Drumahoe Park and Ride will be closed from Monday 14 February until Sunday 6 March to facilitate the completion of final surfacing and road marking works on Tirbracken Road as part of the A6 Dungiven to Drumahoe Dualling scheme.
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Police say the crash happened at 4.25pm this afternoon.
The road was closed earlier also following an early morning fatal collision.
Diversions are in place for Belfast bound traffic at the Glenshane Road junction with the Tirbracken Road while Derry bound traffic is being diverted at the Foreglen Road junction with Baranailt Road.
Motorists are advised to seek alternative routes.