Give TM a whirl. In stock the enemy ships are like a cicada invasion. You can't blink without finding more of them, so it's too easy to rack up the tonnage. I think TM incorporates some of Tater's campaign mod work, which reduces traffic. The RSRD mod is nice in that it tries to make the ship traffic much more realistic.
Someone recently summarized it nicely by saying that TM really improves the sub characteristics, and RSRD really improves the shipping characteristics, and we really need both together. I think someone is working on it this very minute.
