Oops... I naively thought that "my diary" was, well, my diary. A place I could leave myself notes that others might want to look up. I didn't expect them to be sent to uninterested people.

I'll have to keep my broader audience in mind for future entries.

Beware, I'm a newbie. People on OSM-Talk and OSM-Newbie know a lot more than I. If my answer doesn't help, ask again there.

In this case, I didn't import any data. Someone else already imported the US Census TIGER data into OSM.

It's great having something to start with but the data isn't as accurate as I would like. I used JOSM to download parts of I-17 and nearby streets and the Yahoo images. Then I edited the ways to match the photos and then used JOSM to upload my changes to OSM.

It helps that I travel I-17 several times a year. The Yahoo aimages alone wouldn't be enough. After my next trip, I'll compare the ways I travelled with my GPS log.