Throughout undergrad and grad school, I often took trips south of the border. My most common…read moredestination in baja back then was Ensenada, which sits about an hour's drive from the US/Mexico border.
That drive gave me two options: the toll road ("cuota") or the toll-free road ("libre"). I always opted for the toll road, as it is heavily patrolled by law-enforcement, and the commute time is considerably less than the toll-free road.
There are three toll booths between Tijuana and Ensenada, which runs you about three dollars and change per booth. Traffic has never been an issue for me on this road, and neither has anything else.
The scenery along this route is beautiful! The road hugs the cliffs along the coast of Baja California Norte. If you are a fan of winding roads, a-la-PCH-in-NorCal, then you will like this stretch of road as well!
Rosarito sits along this route, about 15 minutes south of Tijuana. There are also various gas stations and convenience stores along the way. I like their coffee, particularly the mochas from 7-Eleven. I also get a couple of bottles of water for my stay in Baja (do NOT drink the tap water!).
This road is safe, day and night. There is often a military check point, but the personnel are pleasant people. The police are no issue either, I've only been questioned once by them. I was riding alone in a beamer in the middle of the night...
Don't let the news scare you, Baja is actually a safe place to visit as long as you don't look for trouble and mind your own business. And if Ensenada or Rosarito is your destination, then take this fine stretch of road there.