Wider could have a major effect on terrestrial non flying mammals but zero effect on aquatic animals (except maybe for the biggest whales). Deeper yes, would made a difference for aquatic species.
Maybe would be a good chance to made two roads separated by a chain of islands instead. More expensive but not without extra benefits. By the way reduces the ever present risk of too long ships. With two isolated lanes you can rely always in the other to keep the road opened.
Those chain of islands in the middle could easily hold infrastructures or attract tourism. And would be a great opportunity to became a sanctuary for migrant birds and fishes without blocking so much the migrant mammals.
And if in the future they need to wide even the channel they could just keep the old docks and remove one island in strategic points to connect both lanes and make space.
And could be done in several steps without blocking the activity or income in the old channel.
https://en.wikipedia.org/wiki/List_of_Lessepsian_migrant_spe...
Wider could have a major effect on terrestrial non flying mammals but zero effect on aquatic animals (except maybe for the biggest whales). Deeper yes, would made a difference for aquatic species.
Maybe would be a good chance to made two roads separated by a chain of islands instead. More expensive but not without extra benefits. By the way reduces the ever present risk of too long ships. With two isolated lanes you can rely always in the other to keep the road opened.
Those chain of islands in the middle could easily hold infrastructures or attract tourism. And would be a great opportunity to became a sanctuary for migrant birds and fishes without blocking so much the migrant mammals.
And if in the future they need to wide even the channel they could just keep the old docks and remove one island in strategic points to connect both lanes and make space.
And could be done in several steps without blocking the activity or income in the old channel.