I know that BEth tried to make the roads have more people on them, but i still feel like they're kinda empty.
So i had some ideas to increase road traffic:
Have caravans travel around with mercenaries (Liker Fallout)
Have towns host tournaments and make some people travel to them.
Have members of College of WInterhold visit court magicians, or vice versa.
Have Jarls go out hunting or visit villages in their holds.

Those are my ideas, if u have anymore please share them.

i really like te jarl idea, the one in felkrath (spelling)saying he hunts with the finnest dogs but i never see him even leave (he aso say i should try being a jarl, im sure i could give it a shot if he had an...accident out on a hunting trip, who better to lead the people than me?

Their isn't much travel because bandits don't usually travel. And 90% of Skyrim's people join some group of bandits . But seriously, those are good ideas.

Counts went for walks In Oblivion somtimes.

Well speaking of tournaments, the only tournament should be Arena fights if that's the case.

More traffic means more clutter in your saves and a heavier game, doesn't it?

Unless it would be random. Farmers with cows one day, huge tournament convoy another?

The Countess of Leyawiin. And she was actually visiting her mother, the Countess of Chorrol

Ha, I followed them one time (she has a torture chamber, I was suspicious...) to see where they were going. We ended up in Chorrol (me: ), then I remembered she was the daughter of the countess. Duh... only every NPC brings up that topic in "Rumors".

It would be nice to see more travelers, caravans, horse riders, etc.

Everyone's too scared to travel due to the backstabbing sneaky sabre toothed cats