Except for crossings over Jersey City rail lines and the Hackensack and the Passaic, the main part of the skyway is a steel deck truss cantilever bridge, supported by concrete piers.
Each of the two river crossings is a 1,250-foot (381 m) combination of a 550-foot (168 m) subdivided (K-shaped) through Pratt truss between the supports and a 350-foot (107 m) basic Pratt truss structure connecting each end to the deck truss part of the skyway.
Spanning the rivers, they reach a clearance height of 135 feet (41 m).
In Jersey City, three short Pratt through truss spans take the roadway over rail lines, the westernmost passing over the Port Authority Trans-Hudson (PATH) rapid transit line and the Conrail Passaic and Harsimus Line.
The two easternmost Pratt through truss spans are in the vicinity of Marion Junction, one of which passes over the Marion Running Track, to the east of which the skyway is low enough to use simple vertical supports.

Design began in 1919 for the Holland Tunnel, the first fixed roadway connection between New Jersey and New York City; construction began in 1922, and the tunnel opened in late 1927.
To provide for a continuous highway connection on the New Jersey side, the New Jersey Legislature passed a bill in 1922 authorizing the extension of Route 1 from its end at Elizabeth through Newark and Jersey City to the proposed tunnel.
It was conceived as the nation's first "super-highway".
State highway engineer Hugh L. Sloan appointed old acquaintance Fred Lavis, a consulting engineer who had worked on foreign rail lines and the Panama Canal and written four books on locating and designing rail lines, to design this Route 1 Extension.
Sigvald Johannesson designed the Skyway portion.

Frank Hague, mayor of Jersey City and boss of the state's political machine, directed the state to avoid the open cuts that were already common where the railroads crossed Bergen Hill, and to include an access ramp in Kearny to spur industrial development.
Construction of the highway, which was mostly raised on embankments and passed through Bergen Hill in a cut, began in mid-1925.
The two major eastern and western sections in Jersey City and Newark—including the viaduct leading to the "covered roadway" (Route 139) and the embankments in eastern Newark—were opened on December 16, 1928, about a year after the tunnel opened.
Traffic was still required to use the Lincoln Highway to cross the Hackensack and the Passaic on the since-replaced drawbridges that frequently stopped traffic to allow ships to pass.

Lavis's design for the final viaduct passageway, which would be raised on concrete piers across the Meadowlands, included two vertical-lift bridges 35 feet (11 m) above the Passaic and Hackensack rivers, sufficient for the majority of ships to pass underneath.
He resigned in 1928, believing his task was complete, but in January 1929 the War Department objected to the continued existence of the Lincoln Highway bridges once the skyway was complete.
Since the Route 1 Extension was not intended for local traffic, and replacing the vertical-lift bridges with tunnels would have been expensive, a compromise was worked out by late 1929 to raise the river bridges to 135 feet (41 m) while allowing the Lincoln Highway drawbridges to remain in place.
The concrete jacketing of the steel was removed from the plans since it would make the taller fixed bridges heavier.
This resulted in more maintenance.

Four companies—the American Bridge Company, McClintic-Marshall Company, Phoenix Bridge Company, and Taylor-Fichter Steel Construction Company—were awarded contracts for the so-called "Diagonal Highway", with construction to start in April 1930.
The two river bridges, McClintic-Marshall's portion, were completed first, and the $21 million road was opened at 8:00 a.m. on November 24, 1932, after an official ceremony the previous day on the Kearny ramp.
Owing to the Great Depression and problems with funding, Governor A. Harry Moore directed the Highway Commission on October 25, 1932 to make a formal request to the U.S. Bureau of Public Roads to cha
Except for crossings over Jersey City rail lines and the Hackensack and the Passaic, the main part of the skyway is a steel deck truss cantilever bridge, supported by concrete piers. Each of the two river crossings is a 1,250-foot (381 m) combination of a 550-foot (168 m) subdivided (K-shaped) through Pratt truss between the supports and a 350-foot (107 m) basic Pratt truss structure connecting each end to the deck truss part of the skyway. Spanning the rivers, they reach a clearance height of 135 feet (41 m). In Jersey City, three short Pratt through truss spans take the roadway over rail lines, the westernmost passing over the Port Authority Trans-Hudson (PATH) rapid transit line and the Conrail Passaic and Harsimus Line. The two easternmost Pratt through truss spans are in the vicinity of Marion Junction, one of which passes over the Marion Running Track, to the east of which the skyway is low enough to use simple vertical supports.
Design began in 1919 for the Holland Tunnel, the first fixed roadway connection between New Jersey and New York City; construction began in 1922, and the tunnel opened in late 1927. To provide for a continuous highway connection on the New Jersey side, the New Jersey Legislature passed a bill in 1922 authorizing the extension of Route 1 from its end at Elizabeth through Newark and Jersey City to the proposed tunnel. It was conceived as the nation's first "super-highway". State highway engineer Hugh L. Sloan appointed old acquaintance Fred Lavis, a consulting engineer who had worked on foreign rail lines and the Panama Canal and written four books on locating and designing rail lines, to design this Route 1 Extension. Sigvald Johannesson designed the Skyway portion.
Frank Hague, mayor of Jersey City and boss of the state's political machine, directed the state to avoid the open cuts that were already common where the railroads crossed Bergen Hill, and to include an access ramp in Kearny to spur industrial development. Construction of the highway, which was mostly raised on embankments and passed through Bergen Hill in a cut, began in mid-1925. The two major eastern and western sections in Jersey City and Newark—including the viaduct leading to the "covered roadway" (Route 139) and the embankments in eastern Newark—were opened on December 16, 1928, about a year after the tunnel opened. Traffic was still required to use the Lincoln Highway to cross the Hackensack and the Passaic on the since-replaced drawbridges that frequently stopped traffic to allow ships to pass.
Lavis's design for the final viaduct passageway, which would be raised on concrete piers across the Meadowlands, included two vertical-lift bridges 35 feet (11 m) above the Passaic and Hackensack rivers, sufficient for the majority of ships to pass underneath. He resigned in 1928, believing his task was complete, but in January 1929 the War Department objected to the continued existence of the Lincoln Highway bridges once the skyway was complete. Since the Route 1 Extension was not intended for local traffic, and replacing the vertical-lift bridges with tunnels would have been expensive, a compromise was worked out by late 1929 to raise the river bridges to 135 feet (41 m) while allowing the Lincoln Highway drawbridges to remain in place. The concrete jacketing of the steel was removed from the plans since it would make the taller fixed bridges heavier. This resulted in more maintenance.
Four companies—the American Bridge Company, McClintic-Marshall Company, Phoenix Bridge Company, and Taylor-Fichter Steel Construction Company—were awarded contracts for the so-called "Diagonal Highway", with construction to start in April 1930. The two river bridges, McClintic-Marshall's portion, were completed first, and the $21 million road was opened at 8:00 a.m. on November 24, 1932, after an official ceremony the previous day on the Kearny ramp. Owing to the Great Depression and problems with funding, Governor A. Harry Moore directed the Highway Commission on October 25, 1932 to make a formal request to the U.S. Bureau of Public Roads to cha
Pulaski Skyway