A dog spent the better part of the Monday evening and Tuesday morning rush hours darting through traffic on Interstate 95 before its rescue and transfer to a shelter, CBS News Station KYW-TV in Philadelphia reports.

The female German Shepherd was first spotted on traffic cameras Monday night as cars slowed down and swerved to avoid hitting her. One man got out of his car to try and catch the dog, but the dog ran off only to reappear Tuesday morning.

Around 6 a.m. Tuesday, on the same stretch of highway, police again started getting reports of a dog on the highway. KYW-TV's helicopter followed the dog as it zigzagged back and forth across four lanes of traffic, nearly getting hit.

Around 9 a.m., the dog wandered off the highway and into Philadelphia's Tacony neighborhood. She ran right by some construction workers.

"Wasn’t anybody's pet, no tags or anything," said worker Brian Czapracki. She "definitely was tired. She'd been running."

Police chased the dog block by block through Tacony, eventually cornering her in a fenced-in lot.

A police officer used a Taser on the dog to get her under control.

"The dog was about to attack one of the officers," said Capt. Francis Bachmayer. "We did not want any injuries."

Police took the dog to the city's animal control shelter, where she underwent several tests.

"The early word is that she appears she will be all right medically," said Wendy Marano, spokeswoman for the Pennsylvania Society for the Prevention of Cruelty to Animals, which runs the shelter. "She is an older animal, and she looks like she's been fending for herself on the streets for a while, so she's a little skittish."

Marano said several people have called asking to adopt the dog, but she's not available just yet.

Shelter workers, however, did give the dog a new name: Northbound. That's for her fondness for the northbound lanes of I-95.