Why is the traffic in industrial zone is always clogged?

[brittle widget]

I'm using this single world for plugin tests and stuff. i dont know why the traffic is that busy Especially in industrial zone.

[gleaming yew]

perhaps you should build more roads heading out of the factory area

[native python]

Build one way roads

[shrewd bobcat]

Industrials just generate a lot more vehicles, just needs more roads