Factors include badly worded state law, flawed NYPD investigations, juries comprised of drivers, and, let's face it, a general sense that vehicular crimes are not treated with the same level of seriousness as other crimes.
One hundred miles of protected bike lanes in two years. No cars on some key routes for cyclists. Less engagement with community boards. And no more delays in life-saving road redesigns "for non-transportation-related political reasons." It's a start.