The problem is that these lights usually have the more traditional red/yellow/green pattern one expects at an intersection like that one. The lights aren't working properly and need to be adjusted. It's a terrible intersection.
On the other hand, it may be that having the lights messed up is forcing people to slow down. I have no idea. It'd be interesting to study. But not if it means there are car wrecks in the meantime.

Thank you for posting this issue. The Traffic Signal Division has been notified.

Work Order Created: 9889

Signal crew responded and verified issue. Repairs completed and intersection back in normal operation.

Thanks for fixing this issue!