This is a very small thing but would have a good commute time and safety impact for the tiny cost of implementing.
At the intersection of Parmer Ln. and Spectrum Dr. the light regulating the Spectrum traffic has a protected left signal on the wire, but I have never seen it get activated. When traffic is busy you can sit through several cycles of that light without any opportunity to make the left turn, which backs up traffic.
What ends up happening is that people will finally give up on waiting and make the left turn without yielding, just doing their best to fit through the oncoming traffic, and creating a dangerous traffic situation.
Switching on the protected left to be a part of the signal's regular cycle would allow people to navigate the intersection safely without making the traffic get backed up.