Rockaway Boulevard in Queens, as well as Rockaway Turnpike in Nassau County, connect the two halves of NY 878. From the end of NY 878 to near Guy R. Brewer Boulevard, the road is maintained by the New York City Department of Transportation (NYCDOT). From Guy R. Brewer Boulevard to just before the city line, the road is designated as the unsigned state reference route NY 909G. The last before the city border are city-maintained. The part of Rockaway Turnpike that connects to NY 878 is maintained by Nassau County.