I agree based I what I have seen, she was dropped off on the west side. But I disagree with the location. I believe she was dropped of on Southbound I-5 right at the exit. If you look at the videos of the crime scene, you can see LEOs gathered around the southbound exit sign. Exit 542 Yolo. The sign in the videos matches up perfectly to the southbound exit sign and you see the orchard trees on the west side of of I-5 in the background. That area seems to be the center of the investigation in the video.
So here is my map of the route I believe she walked. 1. SP was dropped off by the southbound exit sign on I-5. The location of the investigation in the news videos. 2. SP walked down the exit ramp, past the junk yard AKA the drilling company, and crossed over the Interstate on Road 17. 3. She went to the church, and after finding nothing there she walked back to the interstate, and preceded to walk up the northbound exit ramp and onto the freeway. 4. She stood on the gore point and started trying to flag down motorists. Per the witness who saw her and called 911. The location is backed up by the Sheriff's Department dispatch tapes which clearly stated that she was on Northbound I-5, south of Yolo.
If anybody has different information, please correct me.