The physically separated bike lanes seem like a good idea, especially in high-traffic areas.

I note that these lanes are pretty wide. I ride 48" wide cargo trikes and pedicabs. It is critical that the bike lanes be plenty wide for utility HPvs as well as single bikes.

Our Greenway in Minneapolis does this well, except for a couple of places where the bike path suddenly narrows and wide loads are difficult or impossible to fit through.

The standard bike paths in our parks are wide enough for hauling HPVs in most places, but again, sudden narrowing can leave work bikers in a tight spot!

Also, bike lanes jammed with ppedestrians and/or bikers and roller bladers can make workbiking difficult.

This is usually not a problem, but sometimes -- on some holidays or weekends -- the street is preferable to bike paths or bike lanes for work biking.

Finally, I think that it is important to maintain the right to ride in traffic at all times for bikers. Even though bike lanes are good, we must not allow bikers to be forced into a "bikes are only for bike lanes" mode. This would turn out to restrict and reduce the utility of biking in the city.

The physically separated bike lanes shown in NYC look great, though! Great work!