The sign does get their attention. Cars do slow down a little. I can see a stop light in the distance on the highway about 1.5 miles opposite the way I m going. The guy in the RX7 mentioned that it was Lakeville Rd, which i remember was a back road to Petaluma, my destination. It was a good call.
Cars really have to slow down if they are going to make the turn.
After a couple of minutes a very rare event occurs. A 18 wheeler semi stops next to me. The driver just looking out the passenger window at me and my sign. It can be easily read from a distance, but when your up close like he is it becomes a blur. I slow down the scrolling.