The nearest Underground Station to Abbey Road is St. John’s Wood. There is only one exit at this station.
When you exit the station, you will be on the northeast corner of Finchley Road and Grove End Road. Head west on Grove End Road for approximately 500 meters and make a right turn onto Abbey Road.
The Studios – and the crossing – are right there.
You could also take the 139 and 189 buses. There are also daily guided bus tours that stop at the Abbey Road Crosswalk.