MARTILAN TRAFFIC LIGHTS DIAGRAMS
With only one exception, each of the three directional light rows (meaning, excluding the blue 'special' lights) only has one light on at a time. The blue special lights only turn on occasionally.
In further diagrams, a light will be on if it is colored. If it's off, then it will be dark gray.
I have no particular reason for Martilan traffic lights to be green at the top and red at the bottom. It was honestly a mistake, but I decided to keep it because I liked it.
Green lights with the Martilan system always means PROCEED. Therefore, left turns make it clear turning left must YIELD to traffic.
Greater Martil effectively allows 'right on red'. Because red lights ALWAYS means "prohibited, do not go," the right turn is explicitly marked as YIELD.
This is for "right lane must turn" lanes. For left lanes, flip the left and right signals.
Instead of having some intersections with solid green lights and "left turn only" signs, which actually means "unprotected left turn", the FoGM lights just makes it yellow YIELD.
When the pedestrian crossing light turns on, all PROCEED lights switch to YIELD, so drivers know they have to yield to pedestrians.
The otherwise mutually-exclusive directional lights turn on during emergency service override, which is a clear signal that the lane needs to be cleared immediately.
This is what emergency override looks like if it were to happen to the second diagram (solid green). In this scenario, it means drivers *must* proceed, but they may freely choose which lane they vacate towards. This includes left turns, because they are now de-facto protected (other traffic signals lock as DISALLOWED).
This is what it looks like for other lanes. They're made to stay, to make way for the lane emergency services is trying to get through.
During failsafe mode, all other lights shut off.