I did not encounter this problem before today, but after starting a new city, the roads are bending even without the curve button being on.
Any idea what has changed ?
Roads also auto-curve when raised, your roads may have been raised a tiny bit (you can do this by shift-R for example). I just uploaded a small update so they only start auto-curving when it’s at least 5 small steps in the air.
Thank you Daniel for the swift reply, can’t wait to try out the update