I’m concerned about safety on the Fiedler Footbridge, which I cross as a bicycle commuter. Very few of us observe the instruction, posted on a small sign on the Esplanade side, to walk our bikes. There is no sign at the Beacon Street end. I think that the command to WALK BIKES should be painted in big fluorescent letters on the concrete wall at each end, and on the walkway itself. There should be a fine for violation, and it should be collected. Sooner or later, a pedestrian is going to get badly hurt. I understand that there may be all sorts of regulatory and jurisdictional hurdles, as discussed at http://www.bikexprt.com/massfacil/boston/esplanade.htm . The third photo on that site shows the lack of signage at the Beacon Street end, and the fourth (from 2003) shows the sign at the Esplanade end, although the sign is much less apparent in most lighting than the photograph suggests.