Castlecary Junction

The junction at Castlecary, located immediately to the east of the viaduct carrying the Glasgow to Edinburgh rail line, provides access from the B816 to the A80 eastbound carriageway and access to the merge and diverge with the A80 westbound carriageway.

Aerial view of Castlecary Junction

In order to address the problems at Castlecary Junction, the westbound diverge taper will be improved and the substandard westbound merge slip road will be closed.  To reduce traffic volumes in Castlecary village, the right turn movement from the B816 to the M80 eastbound carriageway and the right turn movement from the M80 westbound diverge onto the B816, except buses, will be prevented under the proposed scheme.  Vehicles wishing to make these movements will instead utilise Old Inns Junction. 

A climbing lane has been included on the eastbound carriageway from the Castlecary merge slip road, which will effectively act as a lane gain, up to Haggs Junction where it wil ltie into the existing three lane carriageway of the M80.

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