Exits 20 and 21 (Henry Hudson Parkway)

Exit 20 of the Henry Hudson Parkway is one of two exits for the Henry Hudson Parkway Frontage Roads. The exit going northbound takes you to the 239th Street circle between Inwood and Van Courtland Park. The exit parallels the parkway until turning eastward towards the circle. Exit 20 in the southbound direction is the other frontage road that takes you to West 237th Street.

Exit 21 of the Henry Hudson Parkway is the second of two exits for the Henry Hudson Parkway Frontage Roads between Inwood and Van Courtlandt Park. The northbound exit is for the eastern frontage road, taking you to 246th Street, near the 246th Street Circle. However, going southbound is for the western frontage road taking you to 247th Street.