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Am I the only one that's bothered by the left-lane merges? That's really difficult to implement, esp. in the way it's drawn in the diagram in TFA (no lengthy merger lane).

In the left lane, people go fast. It's dangerous and difficult to merge from an exit ramp onto the left lane.

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See image: http://www.inside-lane.com/wp-content/uploads/2009/11/Diverg...

The roads that merge both have only one lane. The one that comes from the right has a yield sign. It also has a rather sharp bend just before the merge so 1) the cars are unlikely to go at high speeds, and 2) the drivers can easily see each other before the merge, so it's actually good design.

I believe ComputerGuru was talking about the merge into the left lane of the intersecting road while exiting the highway and turning left. It's not the most intuitive of arrangements, especially when combined with the left-hand exit following shortly. Hopefully the drivers on the intersecting road will be sufficiently surprised by the arrangement to break the usual expectation of the left lane being a through lane with higher speed.

One of the two lights is always red (I hope!) so they won't be going that fast.

Actually the whole point is for both of the lights to be green in one direction! :)

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