Total length over 2500 feet
Missouri River Bridge (Walworth County, South Dakota)
Built 1959; rehabilitated 1980
Through truss bridge over Missouri River (Oahe Lake) on US 12
Open to traffic
Built 1959; rehabilitated 1980
Through truss bridge over Missouri River (Oahe Lake) on US 12
Open to traffic
Morrison Bluff Bridge (Logan County, Arkansas)At 1.6 miles this is the longest bridge in Arkansas
Bridge over Arkansas River on AR 109 at Morrison Bluff
Open to traffic
Mount Carmel Bridge (Wabash County, Illinois)Built 1932; rehabilitated 1987
Through truss bridge over Wabash River on IL 15/IN 64 in Mount Carmel
Open to traffic
Mount Hope Bridge (Bristol County, Rhode Island)Built 1929; rehabilitated 1985
Suspension bridge over Mount Hope Bay on RI 114 in Bristol
Open to traffic
Murray Baker Bridge (Peoria County, Illinois)Built 1958; rehabilitated 1984 and 2005
Cantilevered through truss bridge over Illinois River on I-74 in Peoria
Open to traffic
Muscatine Bridge (Rock Island County, Illinois)
Built 1972
Through truss bridge over the Mississippi River on IL 92 at Muscatine
Open to traffic
Built 1972
Through truss bridge over the Mississippi River on IL 92 at Muscatine
Open to traffic
Muscatine Bridge (Muscatine County, Iowa)
Built 1972
Through truss bridge over Mississippi River on IA 92/IL 92 at Muscatine
Open to traffic
Built 1972
Through truss bridge over Mississippi River on IA 92/IL 92 at Muscatine
Open to traffic
Nansemond River Bridge (Suffolk, Virginia)
Built ca. 1930; rehabilitated 1985
Swing bridge over Nansemond River on Kings Highway in Suffolk
Unknown status
Built ca. 1930; rehabilitated 1985
Swing bridge over Nansemond River on Kings Highway in Suffolk
Unknown status
Natchez Bridge (Adams County, Mississippi)
First bridge built 1940; second bridge 1988
Pair of cantilevered through truss bridges over the Mississippi River on US 65 at Natchez
Open to traffic
First bridge built 1940; second bridge 1988
Pair of cantilevered through truss bridges over the Mississippi River on US 65 at Natchez
Open to traffic
Navesink River Bridge (Monmouth County, New Jersey)
Built 1939; rehabilitated 1970
Bascule bridge over Navesink River on CR 8A in Rumson
Open to traffic
Built 1939; rehabilitated 1970
Bascule bridge over Navesink River on CR 8A in Rumson
Open to traffic
Neville Island Bridge (Allegheny County, Pennsylvania)
Built 1976
Steel through arch bridge over Ohio River on I-79
Open to traffic
Built 1976
Steel through arch bridge over Ohio River on I-79
Open to traffic
New Chain of Rocks Bridge (Madison County, Illinois)Built 1966
Bridge over Mississippi River on I 270
Open to traffic
New Chain of Rocks Eastbound (St. Louis, Missouri)
Built 1964
Steel stringer bridge over Mississippi River on I 270 E in St. Louis
Open to traffic
Built 1964
Steel stringer bridge over Mississippi River on I 270 E in St. Louis
Open to traffic
New Harmony Bridge (Posey County, Indiana)Built 1932
Closed four-span through truss toll bridge over Wabash River on IL 14 at New Harmony, Indiana
Open to toll traffic
New River Gorge Bridge (Fayette County, West Virginia)Opened Oct. 22, 1977
Massive steel arch bridge over New River on US 19
Open to traffic
New Youngs Bay Bridge (Clatsop County, Oregon)
Built 1964
Vertical lift bridge over Youngs Bay on US 101 in Astoria
Open to traffic
Built 1964
Vertical lift bridge over Youngs Bay on US 101 in Astoria
Open to traffic
Newark Bay Bridge (Essex County, New Jersey)
Built 1955
Through truss bridge over Newark Bay on the NJ Turnpike Extension (I-78) in Newark
Open to traffic
Built 1955
Through truss bridge over Newark Bay on the NJ Turnpike Extension (I-78) in Newark
Open to traffic
Newark Viaduct (Essex County, New Jersey)
Built 1932; replaced 2003
Lost deck truss bridge over I-78 and railroad tracks on NJ 21 in Newark
No longer exists
Built 1932; replaced 2003
Lost deck truss bridge over I-78 and railroad tracks on NJ 21 in Newark
No longer exists
Newport Bridge (Newport County, Rhode Island)Built 1969
Suspension bridge over East Passage Narragansett Bay on RI 138 in Newport
Open to toll traffic
Newport Bridge (Jackson County, Arkansas)Built 1930
Cantilevered through truss bridge on AR 367 (formerly US 67) over White River at Newport
Open to two-lane traffic
Newtown Creek I-278 Bridge (Kings County, New York)
Built 1940; rehabilitated 1973
Through truss bridge over Newtown Creek on I-278 in New York
Open to traffic
Built 1940; rehabilitated 1973
Through truss bridge over Newtown Creek on I-278 in New York
Open to traffic
Niagara River Bridge (Erie County, New York)
Built 1935; rehabilitated 1963
Through truss bridge over Niagara River on I-190 in Tonawanda
Open to traffic
Built 1935; rehabilitated 1963
Through truss bridge over Niagara River on I-190 in Tonawanda
Open to traffic
North Grand Island Bridge (Erie County, New York)
Built 1935; rehabilitated 1990
Deck truss bridge over Niagara River on I-190 in Niagara Falls
Open to traffic
Built 1935; rehabilitated 1990
Deck truss bridge over Niagara River on I-190 in Niagara Falls
Open to traffic
Obion River Bridge (Obion County, Tennessee)
Built 1928
Through truss bridge over Obion River on TN 211 at Obion
Closed to all traffic
Built 1928
Through truss bridge over Obion River on TN 211 at Obion
Closed to all traffic
Oconee River Bridge (Wheeler County, Georgia)
Built 1940
Swing bridge over Oconee River on GA 46
Open to traffic
Built 1940
Swing bridge over Oconee River on GA 46
Open to traffic
Ogdensburg-Prescott International Bridge (St. Lawrence County, New York)
Built 1960
Suspension bridge over St. Lawrence River at Ogdensburg
Open to traffic
Built 1960
Suspension bridge over St. Lawrence River at Ogdensburg
Open to traffic
Ohio River Bridge (Cabell County, West Virginia)
Built 1985
Cable-stayed bridge over the Ohio River on WV 106 in Huntington
Open to traffic
Built 1985
Cable-stayed bridge over the Ohio River on WV 106 in Huntington
Open to traffic
Ohio River Bridge (Wood County, West Virginia)
Built 1965
Through truss bridge over Ohio River on I-77 in Williamstown
Open to traffic
Built 1965
Through truss bridge over Ohio River on I-77 in Williamstown
Open to traffic
Ohio River KY 8 Bridge (Greenup County, Kentucky)
Built 1987
Through truss bridge over Ohio River on KY 8
Open to traffic
Built 1987
Through truss bridge over Ohio River on KY 8
Open to traffic
Ohio River US 27 Bridge (Campbell County, Kentucky)
Built 1972
Through truss bridge over Ohio River on US 27
Open to traffic
Built 1972
Through truss bridge over Ohio River on US 27
Open to traffic
Ohio River US 62 Bridge (Mason County, Kentucky)
Built 1931
Suspension bridge over Ohio River on US 62 in Maysville
Open to traffic
Built 1931
Suspension bridge over Ohio River on US 62 in Maysville
Open to traffic
Old Sidney Lanier Bridge (Glynn County, Georgia)
Built 1956
Lost vertical-lift bridge over Brunswick River on US 17 at Brunswick
No longer exists
Built 1956
Lost vertical-lift bridge over Brunswick River on US 17 at Brunswick
No longer exists
Old St. Charles Bridge (St. Charles County, Missouri)Completed 1904; closed to traffic in 1992; finally dismantled in 1997
Lost four-span through truss bridge over the Missouri River at St. Charles
Replaced by a new bridge
Old Vicksburg Bridge (Warren County, Mississippi)Built 1930
Cantilevered through truss bridge over the Mississippi River at Vicksburg just north of the I-20 bridge in Vicksburg
Closed to all vehicular and pedestrian traffic, but still used by the Kansas City Southern railroad
Packsaddle Bridge (Roger Mills County, Oklahoma)Built 1929-30; replaced 1985
Lost 26-span through truss bridge over South Canadian River on US 283
Replaced by a modern bridge
Paducah Bridge (McCracken County, Kentucky)Built 1973
Two-span tied-arch bridge on Interstate 24 over the Ohio River between Paducah, KY, and Metropolis, IL
Open to four lanes of traffic
Page Avenue Bridge (St. Louis County, Missouri)Opened Dec. 13, 2003
Pair of tied arch bridges over the Missouri River on MO 364 (Page Avenue)
Open to traffic
Paris Landing Bridge (Henry County, Tennessee)
Built 1927; replaced 1992
Lost through truss bridge over Tennessee River on TN 76
No longer exists
Built 1927; replaced 1992
Lost through truss bridge over Tennessee River on TN 76
No longer exists
Pascagoula River MS 26 Bridge (George County, Mississippi)
Built 1948
Through truss bridge over Pascagoula River on MS 26
Open to traffic
Built 1948
Through truss bridge over Pascagoula River on MS 26
Open to traffic
Passaic River Bridge (Essex County, New Jersey)
Built 1932; rehabilitated 1984
Deck truss bridge over Passaic River on US 1/US 9 in Newark
Open to traffic
Built 1932; rehabilitated 1984
Deck truss bridge over Passaic River on US 1/US 9 in Newark
Open to traffic
Patuxent River Bridge (Calvert County, Maryland)
Built 1952
Swing bridge over Patuxent River on MD 231
Open to traffic
Built 1952
Swing bridge over Patuxent River on MD 231
Open to traffic
Peace Bridge (Erie County, New York)
Built 1927; rehabilitated 1989
Steel arch bridge over Niagara River in Buffalo
Open to traffic
Built 1927; rehabilitated 1989
Steel arch bridge over Niagara River in Buffalo
Open to traffic
Penrose Avenue Bridge (Philadelphia County, Pennsylvania)
Built 1949; rehabilitated 1984
Cantilevered through truss bridge over Schuylkill River on PA 291 (Penrose Avenue) in Philadelphia
Open to traffic
Built 1949; rehabilitated 1984
Cantilevered through truss bridge over Schuylkill River on PA 291 (Penrose Avenue) in Philadelphia
Open to traffic
Piscataqua Bridge (York County, Maine)
Built 1940
Deck truss bridge over Piscataqua River on US 1 BYPASS in Kittery
Open to traffic
Built 1940
Deck truss bridge over Piscataqua River on US 1 BYPASS in Kittery
Open to traffic
Piscataqua River Bridge (Rockingham County, New Hampshire)
Built 1940; rehabilitated 1991
Vertical lift bridge over Piscataqua River on US 1 Bypass in Portsmouth
Open to traffic
Built 1940; rehabilitated 1991
Vertical lift bridge over Piscataqua River on US 1 Bypass in Portsmouth
Open to traffic
Pitt River Bridge (Shasta County, California)Built 1941
Deck truss bridge over Shasta River and railroad tracks on I-5
Open to traffic
Platte Purchase Bridge (Platte County, Missouri)Built 1957; rehabilitated 1997
Through truss bridge over the Missouri River on Northbound US 69 in Kansas City
Open to northbound traffic
Potomac River Bridge (Washington County, Maryland)
Built 1937
Deck truss bridge over Potomac River on US 522 in Bartonsville
Open to traffic
Built 1937
Deck truss bridge over Potomac River on US 522 in Bartonsville
Open to traffic
Potomac River Bridge (Prince George's County, Maryland)
Built 1961; rehabilitated 1984
Bascule bridge over Potomac River on IS 95 in Fort Washington
Open to traffic
Built 1961; rehabilitated 1984
Bascule bridge over Potomac River on IS 95 in Fort Washington
Open to traffic
Potomac River Bridge (Charles County, Maryland)
Built 1939; rehabilitated 1984
Through truss bridge over Potomac River on US 301
Open to traffic
Built 1939; rehabilitated 1984
Through truss bridge over Potomac River on US 301
Open to traffic
Poughkeepsie Railroad Bridge (Dutchess County, New York)
Built 1888 by the Union Bridge Co.
Deck truss bridge over Hudson River on Conrail at Poughkeepsie in Highland
Open to traffic
Built 1888 by the Union Bridge Co.
Deck truss bridge over Hudson River on Conrail at Poughkeepsie in Highland
Open to traffic
Puget Island Bridge (Wahkiakum County, Washington)
Built 1938; rehabilitated 1987
Through truss bridge over Columbia River on WA 409
Open to traffic
Built 1938; rehabilitated 1987
Through truss bridge over Columbia River on WA 409
Open to traffic
Pulaski Skyway Bridge (Hudson County, New Jersey)
Built 1932; rehabilitated 1984
Deck truss bridge over Passaic and Hackensack Rivers on US 1/US 9 in Jersey City
Open to traffic
Built 1932; rehabilitated 1984
Deck truss bridge over Passaic and Hackensack Rivers on US 1/US 9 in Jersey City
Open to traffic
Puyallup Waterway Railroad Bridge (Pierce County, Washington)
Built 1930
Truss bridge over Puyallup Waterway Rr on WA 509 in Tacoma
Open to traffic
Built 1930
Truss bridge over Puyallup Waterway Rr on WA 509 in Tacoma
Open to traffic
Queensboro Bridge (Queens County, New York)Opened to traffic March 30, 1909
Cantilevered through truss bridge over East River on NY 25 in New York
Open to a total of 10 lanes of traffic
Quincy Bayview Bridge (Adams County, Illinois)Built 1986 at a cost of $17,230,000
Cable-stayed bridge over the Mississippi River on westbound US 24 at Quincy
Open to two lanes of westbound traffic
Quincy Memorial Bridge (Adams County, Illinois)Built 1928-1930; rehabilitated 1981
Cantilevered through truss bridge over the Mississippi River on eastbound US 24 at Quincy
Open to two lanes of eastbound traffic
Rainbow Bridge (Jefferson County, Texas)Opened Sept. 8, 1938; parallel bridge built 1991; rehabilitated and reopened to northbound traffic in 1998
Through truss bridge over Neches River on Westbound TX 73 in Port Arthur
Open to traffic
Rappahannock River Bridge (Middlesex County, Virginia)
Built 1957; rehabilitated 1996
Through truss bridge over Rappahannock River on VA 3
Open to traffic
Built 1957; rehabilitated 1996
Through truss bridge over Rappahannock River on VA 3
Open to traffic
Raritan River Bridge (Middlesex County, New Jersey)
Built 1926; replaced 2005
Lost swing bridge over Raritan River on NJ 35 in Sayreville
No longer exists
Built 1926; replaced 2005
Lost swing bridge over Raritan River on NJ 35 in Sayreville
No longer exists
Red River LA 2 Bridge (Bossier Parish, Louisiana)Built 1955; rehabilitated 1992
Five-span through truss bridge over Red River on LA 2
Open to traffic
Richmond - San Rafael Bridge (Contra Costa County, California)Built 1956, Seismic Retrofit Completed 2005
Double deck cantilever truss bridge over San Pablo Bay on I-580 in Richmond
Open to traffic
Rigolets Bridge (Orleans Parish, Louisiana)
Opened to traffic June 9, 1930
Through truss swing bridge over Rigolets Pass on US 90 in New Orleans
Open to traffic
Opened to traffic June 9, 1930
Through truss swing bridge over Rigolets Pass on US 90 in New Orleans
Open to traffic
Rocheport I-70 Bridge (Boone County, Missouri)Built 1960; rehabilitated 1993
Cantilevered through truss bridge over Missouri River and Katy trail on I-70 west of Columbia and south of Rocheport
Open to four lanes of traffic
Rock Island Centennial Bridge (Rock Island County, Illinois)
Built 1940; rehabilitated 1996
Through arch bridge over the Mississippi River on US 67 between Davenport and Rock Island
Open to traffic
Built 1940; rehabilitated 1996
Through arch bridge over the Mississippi River on US 67 between Davenport and Rock Island
Open to traffic
Ross Island Bridge (Multnomah County, Oregon)Built 1926
Steel arch bridge over Willamette River on US 26 in Portland
Open to traffic
Sacandaga Reservoir Bridge (Saratoga County, New York)
Built 1930; rehabilitated 1983
Deck truss bridge over Sacandaga Reservoir on CR 98
Open to traffic
Built 1930; rehabilitated 1983
Deck truss bridge over Sacandaga Reservoir on CR 98
Open to traffic
Sacramento River Bridge (Glenn County, California)
Built 1948; rehabilitated 1961
Through truss bridge over Sacramento River on CA 162
Open to traffic
Built 1948; rehabilitated 1961
Through truss bridge over Sacramento River on CA 162
Open to traffic
Sacremento River Bridge (Solano County, California)
Built 1944; rehabilitated 1960
Vertical lift bridge over Sacremento River on CA 12 in Rio Vista
Open to traffic
Built 1944; rehabilitated 1960
Vertical lift bridge over Sacremento River on CA 12 in Rio Vista
Open to traffic
Sakonnet River Bridge (Newport County, Rhode Island)
Built 1957; rehabilitated 1990
Through truss bridge over Sakonnet River on RI 24/RI 138 in Portsmouth
Open to traffic
Built 1957; rehabilitated 1990
Through truss bridge over Sakonnet River on RI 24/RI 138 in Portsmouth
Open to traffic
Sam Hill Memorial Bridge (Sherman County, Oregon)Built 1962, Deck and rail replacement 2008
Through truss bridge over Columbia River on US 97
Open to traffic
San Francisco Bay Bridge (Alameda County, California)Built 1936; rehabilitated 1962
Suspension and cantilever truss bridge over San Francisco Bay on I-80 in Oakland
Open to traffic; replacement bridge under construction
Sarasota Pass Bridge (Manatee County, Florida)
Built 1957
Bascule bridge over Sarasota Pass on FL 64 in Sarasota
Open to traffic
Built 1957
Bascule bridge over Sarasota Pass on FL 64 in Sarasota
Open to traffic
Sarasota Pass Bridge (Manatee County, Florida)
Built 1956
Bascule bridge over Sarasota Pass on FL 684 in Bradenton Beach
Open to traffic
Built 1956
Bascule bridge over Sarasota Pass on FL 684 in Bradenton Beach
Open to traffic
Seawolf Parkway Bridge (Galveston County, Texas)
Built 1960
Bascule bridge over Pelican Island Channel on Seawolf Parkway in Galveston
Open to traffic
Built 1960
Bascule bridge over Pelican Island Channel on Seawolf Parkway in Galveston
Open to traffic
Shawneetown Bridge (Gallatin County, Illinois)
Built 1955
Cantilevered through truss bridge over the Ohio River on IL 13/KY 56 at Old Shawneetown
Open to traffic
Built 1955
Cantilevered through truss bridge over the Ohio River on IL 13/KY 56 at Old Shawneetown
Open to traffic
Sixth Street / Whittier Blvd over the Los Angeles River (Los Angeles County, California)Built 1932
Steel arch bridge over Los Angeles River on Sixth Street in Los Angeles
Open to traffic
South Canadian River Bridge (Canadian County, Oklahoma)
Built 1933
Pony truss bridge over South Canadian River on US 281
Open to traffic
Built 1933
Pony truss bridge over South Canadian River on US 281
Open to traffic
South Canadian River US 77 Bridge (Cleveland County, Oklahoma)
Built 1938
Thirty-four span deck truss bridge over South Canadian River on US 77 in Purcell
Open to traffic
Built 1938
Thirty-four span deck truss bridge over South Canadian River on US 77 in Purcell
Open to traffic
South Omaha Bridge (Douglas County, Nebraska)
Built 1936; rehabilitated 1999
Through truss bridge over Missouri River on US 275/NE 92/IA 92 in Omaha
Open to traffic
Built 1936; rehabilitated 1999
Through truss bridge over Missouri River on US 275/NE 92/IA 92 in Omaha
Open to traffic
St. Andrews Bay Bridge (Bay County, Florida)
Built 1960; replaced 2003
Lost through truss bridge over St. Andrews Bay on US 98/FL 30 in Panama City Beach
No longer exists
Built 1960; replaced 2003
Lost through truss bridge over St. Andrews Bay on US 98/FL 30 in Panama City Beach
No longer exists
St. Clair River Bridge (St. Clair County, Michigan)Built 1938; rehabilitated 1999
Through truss bridge over St. Clair River on Westbound I-94 in Port Huron
Open to traffic
St. Clair Tunnel (St. Clair County, Michigan)Built 1888-1891; Electrified 1907-1908; Electrification removed 1958: Tube sealed 1994
Tunnel under St. Clair River on Canadian National Railroad in Port Huron
Closed to all traffic
St. Johns Bridge (Multnomah County, Oregon)Built 1931
Suspension bridge over Willamette River on US 30 Bypass in Portland
Open to traffic
St. Johns River Bridge (Duval County, Florida)
Built 1953
Through truss bridge over St. Johns River on FL 10A in Jacksonville
Open to traffic
Built 1953
Through truss bridge over St. Johns River on FL 10A in Jacksonville
Open to traffic
St. Lawrence River I-81 Bridge (Jefferson County, New York)
Built 1938; rehabilitated 1986
Suspension bridge over St. Lawrence River on I-81
Open to traffic
Built 1938; rehabilitated 1986
Suspension bridge over St. Lawrence River on I-81
Open to traffic
Sunshine Bridge (St. James Parish, Louisiana)
Built 1963
Through truss bridge over the Mississippi River on LA 70
Open to traffic
Built 1963
Through truss bridge over the Mississippi River on LA 70
Open to traffic
Sunshine Skyway Bridge (Pinellas County, Florida)Opened to traffic April 20, 1987
Cable-stayed bridge over Tampa Bay on I-275/US 19 at Saint Petersburg
Open to four lanes of traffic
Susquehanna River Bridge (Harford County, Maryland)
Built 1939; rehabilitated 1988
Through truss bridge over Susquehanna River on US 40 in Havre de Grace
Open to traffic
Built 1939; rehabilitated 1988
Through truss bridge over Susquehanna River on US 40 in Havre de Grace
Open to traffic
Tacoma Narrows Bridge (Pierce County, Washington)Built 1940
Lost Wire suspension bridge over Tacoma Narrows on WA-16 in Tacoma
Collapsed in 1940
Tacoma Narrows Bridge (Pierce County, Washington)Built 2007
Suspension bridge over Tacoma Narrows on EB SR-16 in Tacoma
Open to traffic
Tacoma Narrows Bridge (Pierce County, Washington)Built 1949
Suspension bridge over Tacoma Narrows on WA 16 in Tacoma
Open to traffic
Tacony-Palmyra Bridge (Philadelphia County, Pennsylvania)
Built 1929
Bascule bridge over Delaware River on NJ 73 in Philadelphia
Open to traffic
Built 1929
Bascule bridge over Delaware River on NJ 73 in Philadelphia
Open to traffic
Tappan Zee Bridge (Rockland County, New York)
Opened to traffic December 15, 1955
Cantilevered through truss bridge over Hudson River on I-87/I-287/New York State Thruway in South Nyack
Open to seven lanes of traffic
Opened to traffic December 15, 1955
Cantilevered through truss bridge over Hudson River on I-87/I-287/New York State Thruway in South Nyack
Open to seven lanes of traffic
Tennessee River Bridge (Loudon County, Tennessee)
Built 1929; rehabilitated 1957
Through truss bridge over Tennessee River on TN 2 in Loudon
Open to traffic
Built 1929; rehabilitated 1957
Through truss bridge over Tennessee River on TN 2 in Loudon
Open to traffic
Tennessee River Bridge (Lawrence County, Alabama)
Built 1937; rehabilitated 1962
Through truss bridge over Tennessee River on AL 101
Open to traffic
Built 1937; rehabilitated 1962
Through truss bridge over Tennessee River on AL 101
Open to traffic
Tennessee River US 68 Bridge (Marshall County, Kentucky)
Built 1932
Through truss bridge over Tennessee River on US 68
Open to traffic
Built 1932
Through truss bridge over Tennessee River on US 68
Open to traffic
Texas Street Bridge (Bossier Parish, Louisiana)Built 1934; rehabilitated 1984
Cantilevered through truss bridge over Red River on US 80 in Shreveport
Open to four-lane traffic
Thames River Bridge (New London County, Connecticut)
Built 1943; rehabilitated 1975
Deck truss bridge over Thames River on Northbound I-95 in New London
Open to traffic
Built 1943; rehabilitated 1975
Deck truss bridge over Thames River on Northbound I-95 in New London
Open to traffic
Thebes Bridge (Alexander County, Illinois)Built 1905 by a consortium of five railroad companies
Cantilevered through truss railroad bridge over the Mississippi River at Thebes
Open to railroad traffic on two tracks