"transport" refers to the activity of moving something from A to B. It does not refer to the things (vehicles) which are used for that activity. It is an abstract concept. You cannot see "transport". "traffic" refers to vehicles being used on a given public highway at a given time. You can see vehicles and so you can see traffic.

Traffic sounds natural to me. The other ones, not so much.

It's a great place to live apart from the increasing volume of transport vehicles that pass under my window every day. transport vehicles= trucks