Forget Gum. Walking and Using Phone Is Risky.

SAN FRANCISCO — On the day of the collision last month, visibility was good. The sidewalk was not under repair. As she walked, Tiffany Briggs, 25, was talking to her grandmother on her cellphone, lost in conversation.

Very lost.

“I ran into a truck,” Ms. Briggs said.

It was parked in a driveway. (Read the rest at the NY Times online.)