Thanks again everybody. ToomuchStuff, I did take a photo of the sign on the ground at the time of the accident. I also took photos of my injuries at the hospital. The first thing the paramedic said when he arrived was, "Her front wheel hit the sign." It was very obvious. I was about to enter the bike path that crosses under the highway. (It runs perpendicular to the highway.) You have to go on the sidewalk to enter the bike path. The entrance has a tight u type turn with a railing. This part of the highway is just before a freeway on ramp.
Two police officers came to talk to me at the hospital. It seemed like they felt badly that the sign was there. They didn't say it, but their body language was kind of sad and sheepish. (they had gone to a "priority call" instead of coming to me, because at first I thought I could walk to the bus stop and go to Urgent Care, since I could stand. Then I realized I was falling asleep on the cement and I called 911 back.) The emergency team was amazing. I was so impressed with their work. I'm going to write them all thank you notes. It's a very noble calling. They're very compassionate and conscientious.
I wouldn't have fallen if the sign wasn't completely down. I never thought to look at the ground when I ride. From now on I will scan everything in front of me. I had taken the bus on the stretch of the highway near my house that does have a bike path. I just feel safer on the bus. I wouldn't have my child ride a bike on that highway, so I don't.
I'm sure glad I have my stockpile. I have enough food and water to stay home and rest. Thank God I had just gotten some emergency cash at the credit union. From now on, I'm always going to carry cash with me. The cab from the hospital was $30.00.