How do we know that bike boxes are a hit? Was a study or survey done? I'd like to hear about it, if so. I presume that they're a hit with the BTA crowd, but not everyone who bikes supports the BTA (myself included) or this idea. I don't think there will ever be safety for bicyclists until bikes and cars are on separate paths. Until then, bike paths and bike boxes are devices that create illusions but not the reality of safety.
If we're really concerned about safety, we ought to be banning parents from pulling their infants and toddlers around in those bike carriages. Those same parents would be punished and fined if they took those same children into a car with no safety devices, and a car has air bags and steel barriers to protect them. The bike carriage has nothing - just fabric and plastic. I wonder how any parent in good conscience can put their children into one of those and then enter traffic where cars and trucks are moving around them. More to the point, why don't the same people who advocate and mandate car seats for kids ban this reckless and dangerous practice? Are we waiting for the first innocent to be smashed, God forbid, in the name of bike advocacy?