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Exactly. And if those things don't work, and there is still a speeding/bad actors in the park problem, try something else. But above all, how about saying to the concerned citizens, "Thanks. I understand the concern you are raising about [fill-in-the-blank: speeding, or road-end rights of way, or West Shore Road appearances]. It is my job to help resolve that concern. Here are a few things we can try. We have tried those things in Warwick, and others have tried them elsewhere, and many times they work. I commit to trying them here. If they don't work, we can try something else. But we can certainly improve on what you're concerned about."

P.S. You are right that most traffic engineers agree that stop signs do not control speeding very well, see for example http://www.hrg-inc.com/you-cant-stop-speeding-with-a-stop-sign/. It would be more effective to try crosswalks or other road stencils, bumpouts, speedbumps, and enforcement. The key here is that this is not about anyone in Warwick needing to reinvent the wheel. There are tried and true methods for dealing with these common municipal issues. The problem is that no one cares enough to put energy into actually dealing with them.