It
can be tricky if you don't follow your signs carefully. You should have what's called
control cities at your exit. It should say Post and/or Snyder at the U.S. 84 exit. I believe it's the very next exit after I-27 if you go eastbound, as a couple of major east-side north-south side streets don't go completely under Loop 289. There's a tight convergence of three highways coming together in South Lubbock (U.S. 84, I-27, Loop 289) and the triangle is about a mile and a half to two miles in circumference. If 84 is
ever upgraded to a freeway, it could create a very interesting situation there.
If you are going southbound on I-27, you'd need to exit at U.S. 84 (Exit mm 1B) and it's just south of 50th. It's not a direct connect; you will see a traffic signal.