The Romans had gods of little things, like Cardea, the goddess of hinges. So what would the god/dess of traffic control be? The best I can come up with is Delineatus - possibly spelled differently.
Lux Alterna?
I hadn’t thought of lights. Cool.
Semaphorus
Roman? It would be a Goddess: Congestia.
Traffregole`
Chariotis-rex.
All good candidates. I think that Congestia would be the goddess of traffic jams and holdups, though. She and Semaphorus (or Lux) could be antagonists.
The son of Janus, Anus. Because there are a lot of a-holes out there.
Fumidus.
Roundaboutus
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- Snerk - -
Smoked?
I think he’s more specific.
Smokey!
(My Latin is, eh, not so great).
Ah! I like that.
There already is one, right? “Diana Trivia” was a name reflecting the goddess Diana’s “guardianship over roadways, particularly Y-junctions or three-way crossroads. This role carried a somewhat dark and dangerous connotation, as it metaphorically pointed the way to the underworld” (still entirely apt for a traffic deity nowadays).
That may be the answer. But does she use traffic cones?
Torches, I imagine. But this is getting complicated because Janus, whose alternate form “Dianus” is AFAICT linked with the name “Diana”, is also considered a patron deity of roadways?
To be on the safe side, let’s just designate a nymph-attendant of Diana specifically for roadway management and call her Via.
Semaphorus is the original Greek god. Lux Alternativus is the Roman surplant.
That works. So much to contemplate.
Given Julius Caesars attempts at Roman traffic control laws maybe the Divine Julius Caesar?