. >> reporter: driving down urlich just before noon, jonathan simpkins noticed something was not right. >> there were cars stopping, veering off the road. they know something is wrong. >> reporter: the fedex driver slowed down to under five miles >> here, you can't see him. but his head is down. >> reporter: simpkins yells at attention. the fedex driver speeds up and is totally out of control. somehow, he is able to talk the fedex driver into pulling over. >> it is all right. just pull over. >> reporter: once into a parking lot, he convinced the fedex driver into giving up his keys for the safety of all. day. not only somebody else's life, but i think i saved this guy's life. >> reporter: hillsborough county deputies arrived but incredibly because the driver had taken the keys out of his ignition, he wasn't charged with driving under the influence. he is cooperating with authorities. system is getting back to normal. a sheriff's spokesperson blamed verizon. verizon said it didn't know there was a problem until 8 on your side called. it switched the service to backup lines. >>> a disabl