Abducted woman called family from trunk

Though the times given in the article doesn't seem all correct, it seems there were several hours between her phone call and locating the vehicle. The police also "ping her phone" to locate it. My questions are:

1. Why couldn't the police locate her in time, given the her cell phone usage?

2. When will we see a standard for something like digital GPS coordinate data overlaid onto voice 911 calls?