A spokesperson for VicRoads said the width of the road would be at least 11 metres — with each shoulder lane about two metres wide — allowing for emergency access and breakdown on the bridge.
‘‘Included in the design is an emergency access point onto the new bridge road to help facilitate access in times of emergency,’’ the spokesperson said.
‘‘In the event of any significant incidents on our arterial network, VicRoads works closely with the relevant emergency services to manage traffic flow.’’
Mr Walsh said traffic flow determined the size of the new crossing.
‘‘VicRoads do detailed traffic flow studies in any project of this magnitude,’’ he said.
‘‘They know the traffic flow that currently goes through Echuca and Moama and over the current bridge.’’
In a statement, VicRoads said it had been widely shared that the project would be built in stages to meet traffic demands.
The agency said the approved Environment Effects Statement had also set aside land for any future duplication of the alignment, including the new bridge, if required.
The new bridge is expected to be ready by late 2020.