[IanWatson]

Right now the issue in Halifax isn't the capacity of the bike lanes, it's the completeness of the network.

For a lot of people, riding on the road is just not something they will do. It doesn't help them if they can use the bike lane on Bell Road, but then get thrown out into traffic on Robie; in that case, they just stay home or drive.

To Colin's point, adding a new airport in Halifax wouldn't increase air traffic, just as doubling the width of the Hollis bike lane won't increase bike traffic; that's because those are capacity improvements and those facilities are not at capacity. However, adding a route between Halifax and some non-served city would increase overall flight traffic, because that makes the network is more complete.

You see the same issue with sidewalks when the network isn't complete. If a sidewalk just ends, most people won't even use the portion that exists. Yes, a hardy few will keep walking along the grass, but most people will just avoid that sidewalk in the first place.