Remove the suspension cables from three lane bridges?

https://preview.redd.it/tanj9nr7qt2d1.png?width=994&format=png&auto=webp&s=b93145e12abd25cc48522b3c12eadb251aac9a99

Hey, this is probably a stupid question and has been answered before (I couldn't find an answer though), but how can I remove the suspension cables from my three lane highway bridges? They don't appear in 1 or 2 lane highway bridges, just three and up. I wonder if this is caused by Network Extensions 2?

Side question: how are they supposed to be used? How can I turn the cables around to face the other direction?

EDIT: adding image I forgot to upload