Both passenger and freight trains run down the middle of 1st Street, at the bottom of Broadway, along side of Jack London Square. Even though they are a common sight, this is the first time I've seen a warning on a locomotive. Four other trains came by while I was down there, but this was the only one with a message. This may be in response to several accidents and suicides on tracks around the bay this year. It definitely made me want to take a step back. This is my first time linking to Mellow Yellow Monday. Don't know about mellow, but it definitely qualifies for yellow.