One I called 911 to report someone driving on the wrong side of a freeway. I was half sleep in the passenger seat and didn't notice we were on another interstat

One I called 911 to report someone driving on the wrong side of a freeway. I was half sleep in the passenger seat and didn't notice we were on another interstate already. When i said "on highway A" the operator corrected me "don't you mean highway B?" and she was right. I did not get any GPS alert on my phone or confirmation, which given the service I was calling I think it was fine. It is definitely based entirely on inferred data from cell tower usage. No gps involved whatsoever.