William Adams Way will be widened to create a dual carriageway.
Great Yarmouth s vision for a Third River Crossing, for which construction will begin in 2021 and be finished by 2023.
- Credit: BAM Farrans/ Norfolk County Council
On the South Denes side the lifting bridge, which will stand around 7m tall, will connect with the existing road network.
Mr Mulholland said the most challenging section would be when it came to working in the river.
The bridge itself is being built in two halves in Belgium and will be floated over by barge.
Installing it will mean completely closing the river to traffic for 72 hours and timing the operation almost to the second.