The first one and more complex, intersection of two four lanes roads, the one going across being a sort of express way into the valley. The issue here is that there isn’t an alternative way redundancy for vehicles to turn left (well actually there is but too far), which means dedicated lanes and signal times are needed for turning left each time. So instead of going a simple two timed signal (one for each avenue), it needs to be at least 4 timed.
So far its holding pretty well, but remains to be seen in the future when traffic increases. The biggest problem is the increased traffic turning left due to industry district around there.