Today's Albany Times Union has a segment in their weekly Getting There? column that explains some of the history behind how I-90 is designated in the Albany, NY area as well as the Berkshire Spur. The long and short of the article was that I-90 was originally designated on the unsigned portion of the Berkshire Spur, but as free I-90 was built, the designation was moved onto the free portion of road. Additionally, there were talks in 1999 between state and federal officials about the possibility of moving I-90 back onto the unsigned portion of the Berkshire Spur, while extending I-88 onto what we know as free I-90. There would have also had been an I-88/I-90 multiplex between Rotterdam and Albany as a result.