It does not matter how many signs you put up telling drivers to slow down, if the conditions “a nice paved lane of the same width” don’t change, then the speed of most drivers won’t change.

What is needed is a version of “traffic calming” used on neighborhood streets. Why do people naturally slow down on residential streets? The conditions have changed. They see trees overhanging the street, a narrower lane, cars parked at the curb, etc. A lower speed limit is probably posted, typically 25 mph, but even without the signs drivers will slow down.

So, what is needed on the bridge is something that changes the conditions _before_ drivers reach the S-curve section. How about making the lanes narrower, and introducing a slight change of direction back and forth? This kind of change will naturally cause drivers to slow down.

But if the speed limit is actually enforced, people will slow down. Problem solved.

A few cameras on the bridge that automatically photograph cars driving too fast toward the curve despite signs warning to slow down, and then an enforcement mechanism to get those drivers off the road would be a Proactive Design that helps get negligent drivers off the roads, and inspire some fear into drivers to discourage complacency.

-danny