I'm in favor of the concept of the Idaho Stop law, and have basically been operating as if it were law here in New York for 50 years. So I'm totally ambivalent about changing what already works well.
The reality is that police here (not necessarily within the NYC limits) have generally operated under a "no harm - no foul" rule as it comes to bikes, and only enforcing the stop sign law in egregious cases. The same applies to red lights, where I'll stop for cross traffic, or if there's a police car around, whereupon the officers will ask me why I'm waiting when the way is clear.
So, following Lincoln's train of thought, there's no need to change our stop sign laws (as regards bicycles) since they're not enforced strictly anyway.
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