Interstate 78 (I-78) is a part of the Interstate Highway System that runs from Union Township, Lebanon County, Pennsylvania, to New York City. In the US state of New York, I-78 extends . The entirety of I-78 consists of the Holland Tunnel, which crosses under the Hudson River from New Jersey and ends at an exit rotary in Lower Manhattan. The tunnel and its approaches are maintained by the Port Authority of New York and New Jersey (PANYNJ).

I-78 was planned to take a longer route when the Interstate System within New York City was originally proposed in the late 1950s. The proposed route of I-78 was to head east via the Williamsburg Bridge to John F. Kennedy International Airport and then north over the Throgs Neck Bridge to I-95 in the Bronx. One unbuilt section of I-78, the Lower Manhattan Expressway, would have connected the Holland Tunnel to the Williamsburg and Manhattan Bridges. Another unbuilt section, the Cross-Brooklyn and Bushwick Expressways, would have extended southeast across Brooklyn, connecting to what is now the Nassau Expressway (New York State Route 878 or NY 878). A third section would have connected the Nassau Expressway, at the southern edge of Queens near JFK Airport, to the southern end of what is now I-295, in central Queens. Due to opposition from the communities along the expressways' routes, these sections of I-78 were never built, and I-78 does not connect to I-278 or to any of its other auxiliary routes.

Route description

The section of I-78 within New York is long according to the Federal Highway Administration (FHWA), although the New York State Department of Transportation (NYSDOT) considers I-78 to be long. It consists exclusively of the Holland Tunnel, which connects to I-78 in New Jersey. The Holland Tunnel, a National Historic Landmark, was the world's longest underwater vehicular tunnel when it opened in 1927; it consists of two tubes, each of which carries two lanes of traffic in a single direction. The entrance plaza to the westbound tunnel, Freeman Plaza, is a rectangular block, bounded clockwise from the north by Broome, Varick, Watts, and Hudson streets. Four entrances feed into the tunnel from all corners of the block, including an entrance from Canal Street, which intersects Hudson and Watts streets at the southwest corner of the plaza. The westbound portal is located south of Dominick Street, just north of where the four entrances merge.

The exit plaza, referred to the "Holland Tunnel Rotary", is in a square superblock that previously housed the New York Central Railroad's St. John's Park Terminal, bounded clockwise from the north by Laight, Varick, Beach, and Hudson streets. Traffic leaves the tunnel at a portal at the southeast corner of Canal and Hudson streets, then heads southeast along the south line of Canal Street and south along the west line of Varick Street to the northeast corner of the plaza. From there, five exits, which are numbered sequentially, split from the rotary. One exit goes to each corner of the superblock. A fifth exit, added in 2004, splits to Varick Street on the superblock's eastern side. A pedestrian overpass crosses the entrance to the plaza and exit 5 at the northeast corner since the entrance from the tunnel cuts Laight Street.Google Maps street maps and USGS topographic maps, accessed via ACME Mapper

There are four auxiliary routes of I-78 in New York; none of these spurs connect with I-78 because parts of I-78, I-278, and I-478 were not built. I-478 is currently the Brooklyn–Battery Tunnel and approaches, connecting I-278 in Brooklyn with the Battery in Manhattan. It was once planned to continue north along the unbuilt Westway to I-78 at the Holland Tunnel; however, this project was later canceled. I-278, the only I-78 spur to leave New York, has a western terminus in Linden, New Jersey, and passes northward and eastward through all five boroughs, with its eastern end at the Bruckner Interchange in the Bronx. I-278 was planned to extend northwest to I-78 at Route 24 in Springfield Township, Union County, New Jersey.* I-678 runs from JFK Airport in Queens north to the Bruckner Interchange. I-878, signed as part of NY 878, is a short east–west expressway crossing I-678 at JFK Airport, running only within Queens. It was originally planned as part of I-78, connecting to the Bushwick Expressway, I-278, the Williamsburg Bridge, and the Lower Manhattan Expressway.Note that I-95 is shown on the Hutchinson River Parkway north of the Bruckner Interchange, but the 1955 "Yellow Book" map shows the I-78 route on the Bruckner Expressway. The original I-878 is now the segment of I-278 east of the split with NY 895; it connected I-278 with I-78, I-95, and I-678 at the Bruckner Interchange.

History

Existing segment When the Interstate numbering was finalized in the late 1950s, the Harrisburg–New York City route, I-78, was assigned to several proposed roads in New York City. It would leave the Holland Tunnel onto the Lower Manhattan Expressway, crossing the East River on the Williamsburg Bridge and following the Bushwick Expressway across Brooklyn to near Idlewild Airport (now JFK Airport). There it would follow the Nassau Expressway along the north boundary of the airport and turn north along the Clearview Expressway through Queens, crossing the East River again on the Throgs Neck Bridge into the Bronx. Finally, I-78 would split into two branches, one heading west along the Cross Bronx Expressway to the Bruckner Interchange and the other heading northwest along the Throgs Neck Expressway to the Bruckner Expressway near the south end of the New England Thruway. I-78 would also intersect with I-478 (Manhattan Bridge) in SoHo, Manhattan; I-278 (Brooklyn–Queens Expressway) in Williamsburg, Brooklyn; I-495 (Long Island Expressway) in Fresh Meadows, Queens; and I-95 (Cross Bronx and Bruckner Expressways), I-678 (Bronx–Whitestone Bridge), and I-878 (Bruckner Expressway) in Throggs Neck, the Bronx.Port of New York Authority, A Report on Airport Requirements and Sites in the Metropolitan New Jersey–New York Region (OCLC 2551801), 1961, p. 73

Only two sections of I-78 in Queens and the Bronx were built. When the Throgs Neck Bridge and its approaches opened in early 1961, they were signed as I-78. The lack of expressway names on the signs, as specified by federal standards, caused confusion among drivers who knew the highways by their names. The Clearview Expressway was completed to its present extent in mid-1963, and a short eastbound-only piece of the Nassau Expressway opened in 1971. The unbuilt sections of the Lower Manhattan, Bushwick, and Clearview expressways were canceled by the New York state government in March 1971.

The route of part of the Clearview Expressway's unbuilt southern section later became the JFK Expressway, which connects JFK Airport with the Nassau Expressway, Conduit Avenue (NY 27), and the Belt Parkway. The JFK Expressway was completed in 1991.

Canceled segments

Lower Manhattan Expressway

The Lower Manhattan Expressway, also known as LOMEX or the Canal Street Expressway, was a controversial plan for an expressway through Lower Manhattan. The Lower Manhattan Expressway would have begun at the West Side Elevated Highway on the west side of Manhattan, where it would have merged with I-78 at the eastern portal of the Holland Tunnel. From here, the LOMEX would have proceeded generally southeastward as a 10-lane elevated highway, carrying I-78 over what became SoHo and Little Italy. At Centre Street, near the eastern edge of Little Italy, the highway would have split into two branches that both led to bridges over the East River on Manhattan's east side. The main branch would continue southeast as I-78 to the Williamsburg Bridge, while the other would head south to the Manhattan Bridge as I-478. The Manhattan Bridge Spur would have been located above Chrystie Street. The spur to the Williamsburg Bridge would have been mostly depressed or underground, running between Delancey and Broome streets and passing under the Chrystie Street Connection of the New York City Subway. As part of the project, a third tube to the Holland Tunnel would have been built to provide sufficient capacity for the proposed expressway traffic.

The expressway was originally conceived by urban planner and Triborough Bridge and Tunnel Authority (TBTA) chair Robert Moses in 1941. However, efforts to build the highway were delayed until November 1959, when Moses submitted the LOMEX plans for city approval. The New York City Planning Commission approved the expressway in February 1960, and the New York City Board of Estimate voted in favor of the expressway's routing that September. The cost of the plan approved by the Board of Estimate was $80 million (equivalent to $ in ) but later rose to $100 million (equivalent to $ in ). Estimates published in The New York Times in 1962 showed that the $100-million cost would have been covered by $90 million (equivalent to $ in ) from the federal government, $10 million (equivalent to $ in ) from the state of New York, and $220,000 (equivalent to $ in ) in city funds.

The expressway plan encountered logistical issues even before they had been fully approved. After the Planning Commission had approved the expressway proposal, the city moved to evict 2,000 families in 416 buildings along the expressway's route, as well as displace 804 businesses. However, residents started organizing protests against the relocation plan. In response, Mayor Robert F. Wagner Jr. told the affected residents that the timeline for starting construction had not yet been finalized, and so they would not need to move for some time. Opposition also formed over the fact that the highway would create a "Chinese wall" separating the neighborhoods of Lower Manhattan. Members of the affected communities, led by community activist Jane Jacobs, formed groups to protest against LOMEX. Jacobs chaired the Joint Committee to Stop the Lower Manhattan Expressway, which recruited such members as Margaret Mead, Eleanor Roosevelt, Lewis Mumford, Charles Abrams, and William H. Whyte. In his book about the dispute between Jacobs and Moses, the author Anthony Flint stated that newspapers such as The New York Times typically reported Moses's work favorably, while the newly created The Village Voice covered community rallies and advocated against the expressway. Jacobs continued to fight the expressway throughout the rest of the decade, and she was locally seen as a hero for her opposition to the project.

By 1961, Moses had initiated two large federal initiatives to demolish fourteen blocks along Broome Street in Little Italy and SoHo. Moses's plan, funded as "slum clearance" by Title I of the Housing Act of 1949, also called for multiple blocks to be razed and replaced with upscale highrises. The plan ultimately required 132 families to move out, as well as displaced 1,000 small businesses, who relocated to what is now Washington Square Village. In April 1962, Wagner commenced the acquisition of property for the Lower Manhattan Expressway. After further issues with relocation arose in August 1962, Wagner delayed final action on the proposal until after that year's November general elections. A report on the relocation process was published on December 3 of that year. The report stated that the 1,972 families could possibly be relocated without much difficulty. Two days later, there was a tumultuous six-hour-long special executive session of the New York City Board of Estimate on the second floor of New York City Hall, where city officials voted unanimously to block the planned expressway. This served only as a temporary deterrent against the expressway plans, and, in May 1963, Moses announced a revised proposal.