[13of40]

I'm picturing a rail line that just goes north, and in every town along the way the people are a few years older than the last. You can still live wherever you want, but the subsidies for your age group make it a sweet deal to keep moving down the line toward Centenarian City. Known for its large glue factory and landfills.

[red-iron-pine]

This already exists, and is the CN rail line to Hay River. The young folk eventually float down to Edmonton or Calgary.

[peteradio]

Finally my patent for cowcatchers that work inside the train will pay off!

[petre]

Sounds a lot like Snowpiercer.