From Harlem-125th St. train to White Plains Bus Terminal Lane F then line 6 bus to Saw Mill River Rd @ Ashford Ave. 59 min $15. From Madison Av/E 84 St bus to S Broadway @ New Main St then line 5 bus to Saw Mill River Rd @ Ashford Ave. 1 h 31 min $9. From Manhattan taxi to Ardsley. 22 min $127. From Manhattan drive to Ardsley. 22 min $2.