Originally Posted by
Cloudship
Now here is something i never got about traffic light programming. Sure it gives you only 33% versus 50%, but percentage of what exactly?
33% of green time vs. 50% of green time.
If the time the turning traffic needs isn't as important, then the stages can be adjusted to give straight-flowing traffic more time.
Which is exactly why most protected turns (especially in US suburban areas) also have sensors on the, so that they actuate only for the time that's needed, up to a maximum.
In a diverging diamond, your capacity is limited by the capacity of the diamond. A microsim of a specific one would be cool to do.
Provision for pedestrians is poor
If you put in all the sidewalks, I bet you the time it takes for peds to get across the entire structure (lengthwise) will be better than if you had the traditional interchange with all the protected turns. It would be interesting to simulate this in some microsim software to see. It probably wouldn't be much different than a SPUI