New York
Between New York City and Albany, I-87 is part of the New York State Thruway.
I-87 and I-287 are multiplexed for 15 miles between Suffern and White Plains.
North of Albany, I-87 leaves the Thruway and continues through the Adirondacks to the Canadian border, where it becomes Quebec Autoroute 15. This is a very popular New York-to-Montreal route that provides lots of breathtaking scenery.
I-587 in Kingston, NY is a rather odd interstate. It goes from a traffic circle to a traffic light, with no cross traffic in between.