[3][4][5] CR 11 begins at Jericho Turnpike (NY 25) in the incorporated village of New Hyde Park, as Lakeville Road.

CR 11 then crosses over the Northern State Parkway, intersecting with its westbound on-/off-ramps (exit 25 N–S) just north of the overpass.

[3][4][5] It then reaches (and passes below) the Long Island Expressway (I-495) shortly thereafter, connecting to it at exit 33 via Horace Harding Boulevard and Fairway Drive and the South Service Road.

[6][7] This resulted in the tracks and station being depressed into an open cut, and a new bridge carrying Middle Neck Road being constructed; the elimination of the grade crossing improved safety and the flow of vehicles, pedestrians, and trains.

[6][7] In the 1960s, the NCDPW proposed widening the Lakeville Road section of CR 11 between Union Turnpike and the Long Island Expressway.

The unsigned, north–south county route is the primary road serving North Shore University Hospital.

[3][4][5] CR 11A begins at the South Service Road of the Long Island Expressway (I-495) in Lake Success, at Exit 33 of I-495.

It then runs north-northeast, crossing beneath I-495 and immediately reaching the North Service Road, as well as Exit 33's westbound on-/off-ramps.

From there, the road curves northwards, soon entering Manhasset and passing (and providing access to) North Shore University Hospital and The Feinstein Institutes for Medical Research.

[11][12] The CR 11A designation previously extended from I-495 Exit 33 in Lake Success to West Shore Road in Kings Point, via Community Drive, East Shore Road, Hicks Lane, and Arrandale Avenue, prior to the Nassau County altering its county route numbering scheme; it connected to CR 11 (its parent) within the Village of Great Neck.