The viaduct will take the route across the A413, the Chiltern Railway Line and Small Dean Lane. It will be 345 metres long and take two years to construct. It will have five piers and be six metres above the road. The main compound will be in place for over four years. Road Barn Farm has been demolished along with three associated outbuildings. National Grid overhead power lines have been diverted via three new pylons.
Small Dean Lane will be closed to all traffic during construction before being realigned. A temporary footpath and bridleway bypassed the closure at times during construction. The A413 will be temporarily diverted during construction of the piers before being realigned under the viaduct
PRoW Wen 57/1 will be closed during construction before being reinstated along its original alignment. A conveyor system will take spoil across the A413, the Chiltern Railway and Small Dean Lane.
A shared foot and cycle path will be built alongside the main road as it passes under the viaduct. This will eventually form part of the Misbourne Greenway project designed to link Wendover with Great Missenden.