Template:Main Page/Historic byways/August

• Aug. 1, 1949 – A bypass of Secaucus, New Jersey is opened as part of Route 3
• Aug. 1, 1956 – Two sections of New York's Southern Tier Expressway ending at Horseheads and Elmira are connected
• Aug. 1, 2007 – The I-35W Mississippi River bridge carrying Interstate 35W across the Mississippi River in Minneapolis, Minnesota collapses, killing 13 people
• Aug. 2, 1974 – The express roadways of the Garden State Parkway are extended from Keyport to Tinton Falls, New Jersey
• Aug. 2, 1999 – Elmira, New York's Clemens Center Parkway is extended south from Miller Street to NY 427
• Aug. 3, 1962 – The westbound lanes of Interstate 78 in New Jersey are opened from Bloomsbury to Pattenburg Road
• Aug. 3, 1967 – Interstate 890 is extended to Campbell Avenue (NY 337)

• Aug. 4, 1954 – The southbound section of the Garden State Parkway is opened from the Eatontown Spur (now Route 36)to New Brunswick Avenue in Woodbridge Township, leaving only a gap northbound from Eatontown to Sayreville in Middlesex and Monmouth Counties
• Aug. 4, 1965 – New York's Youngmann Memorial Highway is extended from US 62 to the Niagara Thruway, completing the highway
• Aug. 5, 1954 – A section of the Garden State Parkway is extended south from Route 72 in Manahawkin to Greenbush Road in New Gretna
• Aug. 5, 1955 – The southwest section of Rochester's Inner Loop opens, from West Main Street to the Troup-Howell Bridge
• Aug. 5, 1970 – The westbound lanes of New York's Southern Tier Expressway from Steamburg to western Salamanca are opened; the eastbound lanes had opened a few years prior
• Aug. 6, 1945 – The first section of New Jersey's Route S3 is opened, branching from Route 3 in East Rutherford to Route 17 in Rutherford
• Aug. 6, 1976 – A helicopter crashes on Interstate 84 near Patterson, New York, causing power outages and closing the highway for several hours

• Aug. 7, 1951 – The Pennsylvania Turnpike is extended west from Irwin to the Pittsburgh interchange at Monroeville
• Aug. 7, 1954 – A gap in the southbound Garden State Parkway from US 9 in Sayreville to the Eatontown Spur is closed, completing the highway within Monmouth County
• Aug. 8, 1957 – The south fork of the bypass of Ithaca, New York's Commons is opened, completing the 'tuning fork'
• Aug. 8, 1958 – Two arterials are opened to service Fulton, New York: a southerly bypass of NY 3, and a realignment of NY 57 along Second Street
• Aug. 8, 1959 – A section of New York's Quickway is extended from Bridgeville around Monticello
• Aug. 8, 1963 – Interstate 80 in New Jersey is extended from Mount Arlington Boulevard to US 46 in Netcong

• Aug. 10, 1962 – The northern section of Rochester's Inner Loop from the Central Street Bridge to Scio Street opens
• Aug. 10, 1990 The final section of coast-to-coast I-10 is dedicated, the Papago Freeway Tunnel under downtown Phoenix, Arizona.
• Aug. 11, 1954 – A large section of the Garden State Parkway is opened from Tilton Road in Egg Harbor Township to US 9 at the south bank of the Mullica River; north of the White Horse Pike, the road initially operated as a temporary super two on the southbound lanes
• Aug. 11, 1971 – New York's Aurora Expressway is extended from Maple Street to US 20A
• Aug. 13, 1958 – A bypass of Penn Yan, New York's Main Street is opened along Liberty Street as part of NY 14A
• Aug. 13, 1986 – After years of delay due to environmental concerns, two sections of Interstate 78 are linked from Drift Road in Watchung to NJ 24 at Springfield

• Aug. 14, 1957 – The official route numbering of the Interstate Highway System is adopted by the Federal Works Agency
• Aug. 14, 1981 – New York's Southern Expressway is extended from NY 391 in North Boston to NY 39 at Springville
• Aug. 15, 1974 – The western leg of Rochester's Inner Loop northbound is relocated from a surface arterial to a freeway further west, completing I-490
• Aug. 15, 1962 – Rochester, New York's Can of Worms is put in service with the opening of a section of the Eastern Expressway, allowing four lanes of travel from downtown Rochester to the New York State Thruway
• Aug. 15, 1963 – Utica, New York's North South Arterial Highway is opened south of Oriskany Boulevard
• Aug. 15, 1967 – A gap in the Kensington Expressway is closed from NY 240 to Fillmore Avenue
• Aug. 16, 1956 – The first section of the Indiana Toll Road opens from the Ohio line to US 31 outside of Roseland, north of South Bend
• Aug. 16, 1972 – NY 481 is extended south from NY 31 in Clay to I-81
• Aug. 16, 1982 – Ground is broken on Interstate 481 north of the New York State Thruway
• Aug. 16, 1983 – An extension of New York State Route 390 opens from NY 104 to the Lake Ontario State Parkway
• Aug. 16, 2005 – The portion of New York's I-490 from exit 9 (I-390 and NY 390) in Gates to exit 27 (NY 96) in Perinton is ceremoniously designated as the "Erie Canal Expressway" by the New York State Legislature

• Aug. 17, 1961 – A 40-mile section of Interstate 81 from NY 17 at Five-Mile Point, New York to PA 107 opens
• Aug. 17, 1966 – New York State opens a $17-million section of the Adirondack Northway between Warrensburg and exit 26 at Pottersville.
• Aug. 17, 1971 – The roadways of the southbound Garden State Parkway and US 9 in Woodbridge Township, New Jersey are flipped as part of an upgrading of the interchange between the highways
• Aug. 19, 1955 – A section of the Quickway from NY 208 to Chester opens, connecting two extant sections
• Aug. 19, 1964 – The first northerly extension of New Jersey's Middlesex Freeway is opened from US 22 in Bridgewater to US 206 in Bedminster

• Aug. 20, 1969 – The first section of New York's Aurora Expressway is opened, extending exit 54 of the New York State Thruway to Jamison Street in Elma
• Aug. 20, 2007 – A $60-million project to elevate the Southern Tier Expressway and remove at-grade intersections in Horseheads, New York between NY 14 and NY 13 is completed
• Aug. 21, 1954 – The northbound lanes of the Garden State Parkway are opened from US 30 in Galloway Township to the foot of the Mullica River at US 9
• Aug. 21, 1957 – A section of the New York State Thruway is opened from the Pennsylvania line to Silver Creek
• Aug. 21, 1984 – Interstate 990 is extended from Sweet Home Road to North French Road
• Aug. 22, 1956 – The gap in the Bronx's Major Deegan Expressway in New York between 176th to 193rd streets is filled
• Aug. 22, 1968 – Syracuse, New York's Onondaga Interchange opens, linking two sections of the Penn-Can Highway and extending the western leg of I-690 to the interchange
• Aug. 22, 1980 – Eastern Boulevard south of Canandaigua, New York is extended as Western Boulevard to West Avenue, bypassing the city to the south
• Aug. 22, 1986 The final section of the coast-to-coast I-80 is dedicated on the western edge of Salt Lake City, Utah, making I-80 the world's first contiguous freeway to span from the Atlantic to Pacific Ocean and, at the time, the longest contiguous freeway in the world.
• Aug. 22, 2013 – The gap in New York's US 15 freeway is closed southbound between Lindley and Presho

• Aug. 23, 1954 – The Delaware River Extension of the Pennsylvania Turnpike opened between King of Prussia and US 611 in Willow Grove
• Aug. 23, 1963 – The southbound lanes of the southernmost section of New York's Adirondack Northway are extended from NY 149 to NY 9N south of Lake George
• Aug. 24, 1971 – The westbound portion of the Bergen-Passaic Expressway between New Jersey Route 23 and Squirrelwood Road in West Paterson is opened
• Aug. 25, 1954 – The sections of the New York State Thruway terminating at US 15 in West Henrietta and the NY 5 interchange at Amherst are connected by the opening of a 63 mile section between the two
• Aug. 25, 1976 – The Southern Tier Expressway is extended westward from Jamestown to Bemus Point
• Aug. 25, 2017 – The northbound/westbound span of the new Tappan Zee Bridge is opened for traffic along the New York State Thruway

• Aug. 26, 1950 – A new bridge across the Chemung River to Corning, New York's east opens, soon to be linked to the Denison Parkway
• Aug. 27, 1954 – The Atlantic County section of the Garden State Parkway is extended from Tilton Road in Egg Harbor Township to US 9 at Somers Point, temporarily as a super-two on what would become the southbound lanes
• Aug. 27, 1970 – The Irondequoit–Wayne County Expressway, a realignment of US 104, opens between the Sea Breeze Expressway and Five Mile Line Road
• Aug. 27, 1970 – The Interstate 84 bridge over the Delaware River links the existing section in New York at Port Jervis to US 6/209 in Matamoras
• Aug. 27, 1980 – A disconnected section of New York's Interstate 88 is opened from Richmondville to Cobleskill
• Aug. 27, 2023 – The final sections of the old I-74 Bridge which carried Interstate 74 between Iowa and Illinois are demolished by explosives.
• Aug. 28, 1954 – A gap in the Garden State Parkway between US 9 at Chestnut Neck and East Greenbush Road at New Gretna is bridged by a new bridge over the Mullica River, opened as a super-two before the other lanes are opened a few weeks thereafter; the Cape May County section was also extended from exit 12 north to Route 50 in Seaville
• Aug. 28, 1958 – The southeasterly section of Rochester's Inner Loop from South Street to George Street (now roughly Adventure Place) opens.
• Aug. 28, 1969 – Rochester, New York's Eastern Expressway is completed with the opening of the section from the New York State Thruway to NY 96 at Bushnell's Basin

• Aug. 29, 1957 – The final section of the Garden State Parkway is opened from Grand Avenue in Montvale, New Jersey to the New York State Thruway at Chestnut Ridge, New York
• Aug. 29, 1969 – The section of New York's Southern Tier Expressway from Apalachin to Westover opens
• Aug. 29, 1977 – A bypass of Camillus, New York, including NY 695, is opened as NY 5 is rerouted onto the new highway
• Aug. 29, 1980 – The section of the Genesee Expressway from Dansville to NY 36 in Groveland opens
• Aug. 30, 1973 – A gap in New York's Southern Tier Expressway between Waverly and Nichols is closed
• Aug. 30, 1974 – Albany, New York's Northside Route is extended from Miller Road to US 9/20 in Schodack
• Aug. 31, 1956 – The New York State Thruway reaches its eastern terminus with the opening of an extension from Tuckahoe Road in Yonkers to the Major Deegan Expressway in the Bronx
• Aug. 31, 1967 – The final gap in New York's Adirondack Northway is bridged between Underwood and Keeseville