In the 1927 New Jersey state highway renumbering, Route 34 was legislated to run from an intersection with Route 35 ( now Route 88 in Laurelton, Ocean County north to Route 4 ( now Route 79 ) in Matawan, with the portion of current Route 34 north of that intersection legislated as part of Route 4.

In the 1927 New Jersey state highway renumbering, Route 35 was designated to run from Lakewood to South Amboy, replacing pre-1927 Route 4 from Lakewood to Belmar and from Eatontown to South Amboy with the portion of pre-1927 Route 4 between Belmar and Eatontown becoming Route 4N ( now Route 71 ).

In the 1927 New Jersey state highway renumbering, Route 38 was legislated to run along the route from Route 25 ( now U. S. Route 130 ) in Pennsauken Township east to Route 39 ( now U. S. Route 206 ) in East Hampton.

In the 1927 New Jersey state highway renumbering, Route 10 was renumbered to Route 5.

In the 1927 New Jersey state highway renumbering, Route 7 was designated to run from Jersey City to Paterson, replacing Pre-1927 Route 11 between Belleville and Paterson.

In the 1927 New Jersey State Highway renumbering, Route 23 was designated to run from Route 9 ( now County Route 506 ) in Verona north to the New York border near Port Jervis, replacing pre-1927 Route 8 from Verona to Sussex.

In the 1927 New Jersey state highway renumbering, Route 37 was legislated to run from Route 27 and Route 30 ( now U. S. Route 1 Business, U. S. Route 206, and Route 31 ) in Trenton to Route 35 ( now Route 88 ) in Point Pleasant, passing through White Horse, Allentown, Lakehurst, Toms River, and Seaside Heights.

In the 1927 New Jersey state highway renumbering, pre-1927 Route 6 between Camden and Salem became Route 45.

In the 1927 New Jersey state highway renumbering, the portion of pre-1927 Route 14 between Seaville and Egg Harbor City was designated as Route 50, the highest state route number assigned in the renumbering.

In the 1927 New Jersey state highway renumbering, this portion of pre-1927 Route 12 west of Penwell in Mansfield Township was legislated as a part of Route 24, a route that was to run from Phillipsburg to Newark, while the portion between Penwell and U. S. Route 46 in Hackettstown was designated as Route S24, a spur of Route 24.

In the 1927 New Jersey state highway renumbering, a spur of Route 41 called Route S41 was legislated to run from the Tacony-Palmyra Bridge south to Berlin along what is today Route 73.

In the 1927 New Jersey state highway renumbering, the route was legislated as part of Route 4, which was to run from Cape May to the George Washington Bridge.

In the 1927 New Jersey state highway renumbering, this portion of pre-1927 Route 5 became a part of Route 24, a road that was to run from Phillipsburg to Newark.

In the 1927 New Jersey state highway renumbering, this portion of the Black Horse Pike was designated as part of a new route, Route 42, that was to run from Ferry Avenue in Camden south to Route 48 ( now U. S. Route 40 ) in McKee City.

In the 1927 New Jersey state highway renumbering, the route became Route 28.

In the 1927 New Jersey state highway renumbering, Route 18N was truncated northward to Fort Lee.

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