Inducing demand is not just from mode-shift (towards cars in this case), but also from development. Take the example of a big city on a big island (e.g. Montrea

Inducing demand is not just from mode-shift (towards cars in this case), but also from development. Take the example of a big city on a big island (e.g. Montreal), a larger bridge may encourage sprawl off-island rather than infill development on-island. A choke-point like a bridge isn't just a sort of barrier (geographic, social economic...), but also an opportunity to manage travel patterns and thus development.