 The Domain Tunnel is 1.6 km long and comprises 460 metres of cut and cover tunnel at the west end, 680 metres of driven tunnel and 500m of cut and cover which includes a shallow river crossing.The western portal is shared with the longer Burnley Tunnel that carries traffic in the other direction.Roadheaders were used to dig the bored section of tunnel, while at the eastern end the 170-metre final section of cut and cover was built under the Yarra River, with a cofferdam being moved as construction continued, permitting the river to keep flowing.