My idea was, however, to install "GO" signs.
This does not work well either.
In my area there is a road with 2 lanes going east, a median, 2 lanes going west. There is a light at one point for a parking garage entrance.
There is a stoplight for all lanes except the far right east-bound lane. There are multiple signs as one approaches the traffic light that say "Right lane continuous green." "Right lane do not stop" "Right lane no stopping"
Yet every week someone blocks a mile of traffic because they are in the right lane and slam on their brakes when the left lane lights goes red. The brake-slammer will get rear-ended (55 mph speed zone) and often there is a domino factor.
Good thing that light is the entrance to the parking garage for a hospital.