Thin Red Line

I messed with this picture (gee, can you tell?) because I want you to see that red line on the road. If I don't myrtilize the picture, the line fades out of your vision, like this:

The line is turning north from Colorado Blvd. onto Sierra Madre Blvd., heading up toward Pasadena High School.

I've turned that corner over and over again but didn't notice the red line until the other day when it finally caught my eye. What's it for?

Aha. It can only be one thing. It's marking a route.

This is the relatively inglorious part of the route of the Tournament of Roses Parade. Floats turn north here off of Colorado Blvd. and wind things up near the High School. I only say "inglorious" because this part's not seen on TV. The floats are still beautiful here, and thousands of parade viewers still line the route. In fact there's RV parking near the high school, and one of the parade's honored traditions, the Post Parade Showcase of Floats, takes place there every year. For people who don't want to camp all night in the cold (and it does get too cold here for the likes of me to sleep outside), the Post Parade Showcase is a calmer, warmer way to see the parade. You can walk among the floats and see them close up for a reasonable fee.

I find no reference to the red line on the web. If you've got info, let us know. Can the float drivers see it under their floats? Do they look for it between the posies on the windows of their flower-bedecked Mac trucks? Or do they just know the way?