I wonder if the ping if from Baucum Rd is from what is called Baucum Pike Rd aka Old England Hwy and is HWY 165, which goes to Scott and you get off 165 to 161 and then turn on to Upper Steel Bend Rd. There is also a different road (the one in the picture in your link) It is a totally diff road, its HWY 391 it runs into HWY 70, turn left on Hwy 70 go down a few miles then turn left onto South Kerr.. (confusing as hell road names huh)
IF a person came from Upper Steel Bend Rd, hit Baucum Pike/Old England Hwy/Hwy 165 and drove back towards Interstate 440 got on 440 and went over the Arkansas River and followed it around then at the fork took Interstate 30, Roosevelt Rd would be right there. Personally, if the pings were close in time together, this is the route I think took. JMHO (to add more confusing, if you knew the area, you could get off before the spot where the interstate splits up, at the LR Airport.. and hit Roosevelt)
Google is a friend. Put this in, Upper Steel Bend Rd, Scott AR then directions to University of Arkansas at Little Rock on University Ave LR. (will give you that option) 18.1 miles / 26 min with no traffic. If CL had class at the school or any of the local hospitals that night she could have had ample time to make it to class... jmho