The Colorado example is about no longer giving out carrots rather than using any type of stick. Tolls and higher taxes would be examples of sticks.
> clogging the roads
The roads already be clogged and adding more lanes is not likely to unclog them. Single occupancy vehicles at the end of the day are not a solution for moving hundreds of thousands of people around - there's an intrinsic scaling problem that can't be solved by building infinite roads.
It's kinda like trying to get high speed internet by adding more & more 56k modems.
> clogging the roads
The roads already be clogged and adding more lanes is not likely to unclog them. Single occupancy vehicles at the end of the day are not a solution for moving hundreds of thousands of people around - there's an intrinsic scaling problem that can't be solved by building infinite roads.
It's kinda like trying to get high speed internet by adding more & more 56k modems.