| I-83 over Csx Mta Amtrak And Nor | Baltimore | 1183.1 ft | 127,291 | 1959 |
| I-83 over Jones Falls (mi. 7.1 To | Baltimore | 1199.1 ft | 105,600 | 1959 |
| Perring PKWY Ramp over Herring Run | Baltimore | 203.1 ft | 75,220 | 1965 |
| Russell Street Via over Ostend Street And Csx | Baltimore | 1269.0 ft | 70,700 | 1951 |
| Is 70 EB over US 11 | Washington | 149.0 ft | 62,680 | 1965 |
| Is 70 WB over US 11 | Washington | 149.0 ft | 62,680 | 1965 |
| Is 70 EB over Md 632 | Washington | 175.9 ft | 62,680 | 1966 |
| Is 70 WB over Md 632 | Washington | 175.9 ft | 62,680 | 1966 |
| Pulaski Highway over Herring Run | Baltimore | 153.9 ft | 58,858 | 1921 |
| Md 4 Wbr over Md 717 | Prince George's | 91.9 ft | 46,652 | 1959 |
| Russell Street over Csx | Baltimore | 211.9 ft | 46,276 | 1963 |
| Clara Barton Parkw over Clara Barton Parkway (sb | Montgomery | 1409.1 ft | 40,057 | 1959 |
| Is 70 Ramp A over Beaver Creek | Washington | 158.1 ft | 37,200 | 1968 |
| Father Hurley Boul over Little Seneca Creek Trib | Montgomery | 44.9 ft | 33,220 | 1995 |
| Oxon Hill Road over Broad Creek | Prince George's | 128.9 ft | 30,739 | 1963 |
| West Gude Drive over I-270 | Montgomery | 253.9 ft | 30,343 | 1985 |
| I-83 over Mta Light Rail | Baltimore | 874.0 ft | 29,900 | 1962 |
| Hanover Street over Csx | Baltimore | 206.0 ft | 28,030 | 1929 |
| Broening Highway over Colgate Creek | Baltimore | 578.1 ft | 27,231 | 1968 |
| US 40 Orleans Str over I-83 And City Streets | Baltimore | 1728.0 ft | 23,831 | 1936 |
| On Ramp 29th Stree over I-83 NB | Baltimore | 340.9 ft | 23,318 | 1959 |
| Cherry Hill Road over Little Paint Branch | Prince George's | 109.9 ft | 22,938 | 1966 |
| Halfway Boulevard over Norfolk Southern Railroa | Washington | 125.0 ft | 21,909 | 1967 |
| Rossville Boulevar over Amtrak Railroad And Orem | Baltimore | 344.2 ft | 20,575 | 1971 |
| US 1 over N Tollgate RD Ped Trail | Harford | 110.9 ft | 20,542 | 1963 |
| Baughmans Lane over Rock Creek | Frederick | 43.0 ft | 20,388 | 1970 |
| Md 26 over Liberty Reservoir | Carroll | 1719.2 ft | 20,192 | 1954 |
| Tuckerman Lane over Snakeden Branch | Montgomery | 27.9 ft | 19,882 | 1966 |
| Shady Grove RD EB over Csxt Railroad | Montgomery | 182.1 ft | 19,679 | 1976 |
| Sinclair Lane over Moores Run | Baltimore | 86.0 ft | 18,265 | 1962 |
| Seven Locks Road over Cabin John Creek Tributa | Montgomery | 22.0 ft | 18,184 | 1965 |
| Midcounty HWY & Mi over Mill Creek | Montgomery | 64.0 ft | 17,842 | 1984 |
| Southlawn Lane over Rock Creek | Montgomery | 32.5 ft | 16,792 | 1920 |
| Monroe Street Ramp over Csx | Baltimore | 207.0 ft | 16,520 | 1963 |
| Old Court Road over Gwynns Falls And Mta Met | Baltimore | 382.9 ft | 16,498 | 1961 |
| Brink Road over Great Seneca Creek | Montgomery | 64.0 ft | 16,456 | 1936 |
| Harry S Truman Dri over Southwest Branch | Prince George's | 86.9 ft | 16,141 | 1974 |
| Ericsson Road over Clara Barton Parkway | Montgomery | 120.1 ft | 16,120 | 1962 |
| Naylor Mill Road over Naylors Pond Stream | Wicomico | 59.4 ft | 15,353 | 1963 |
| Hawkins Point Road over Csx | Baltimore | 99.1 ft | 15,177 | 1930 |
| Hanover Street over Middle Branch | Baltimore | 2023.0 ft | 14,220 | 1916 |
| Temple Hill Road over Tinkers Creek | Prince George's | 40.0 ft | 13,216 | 1960 |
| Mill Street over Wicomico River East Bran | Wicomico | 121.1 ft | 12,237 | 1958 |
| Peninsula Expressw over Csx Railroad | Baltimore | 245.1 ft | 11,183 | 1960 |
| Peninsula Expressw over Csx Railroad | Baltimore | 245.1 ft | 11,183 | 1960 |
| Tamar Drive over Unnamed Stream | Howard | 53.8 ft | 10,941 | 1970 |
| Broken Land Parkwa over Trib To Little Patuxent | Howard | 48.9 ft | 10,830 | 1972 |
| Greentree Road over Bulls Run | Montgomery | 24.9 ft | 10,816 | 1949 |
| Radecke Avenue over Moores Run | Baltimore | 36.1 ft | 10,737 | 1930 |
| Harford Road over Csx Railroad | Baltimore | 25.9 ft | 10,713 | 1900 |
| Greenmount Avenue over Csx Railroad | Baltimore | 26.9 ft | 10,713 | 1914 |
| US 522 over Potomac Riv Csx Trans. | Washington | 2577.1 ft | 10,550 | 1937 |
| Kelly Avenue over I-83 Jones Falls & Mta | Baltimore | 789.0 ft | 10,400 | 1925 |
| Abingdon Road over Csx Railroad | Harford | 199.1 ft | 10,242 | 1940 |
| 41st Street over I-83 And Jones Falls | Baltimore | 1237.9 ft | 10,157 | 1930 |
| Nasa Access Road over Baltimore-washington Par | Prince George's | 380.9 ft | 10,000 | 1966 |
| Frederick Road over Hunting Creek | Frederick | 67.9 ft | 9,402 | 1928 |
| Campus Drive over Northeast Branch | Prince George's | 140.1 ft | 8,781 | 1964 |
| Columbia Road over Plumtree Branch | Howard | 49.2 ft | 8,641 | 1987 |
| Dennis Avenue over Sligo Creek Tributary | Montgomery | 34.1 ft | 8,590 | 1961 |
| Spring Street over Csxt Rr & Wmata Metro | Montgomery | 212.9 ft | 8,204 | 1968 |
| King Avenue over Tributary To White Marsh | Baltimore | 42.3 ft | 8,126 | 1978 |
| Md 5 over Hilton Run | St. Mary's | 34.1 ft | 8,010 | 1936 |
| Moravia RD Ramp E over Pulaski Highway | Baltimore | 236.9 ft | 7,760 | 1956 |
| Glen Arm Road over Long Green Creek | Baltimore | 77.1 ft | 7,740 | 1987 |
| Tufton Avenue over Waterspout Run | Baltimore | 23.0 ft | 7,735 | 1920 |
| Lansdowne Boulevar over Csx Railroad | Baltimore | 164.0 ft | 7,620 | 1964 |
| Riverdale Road over NE Branch Of Anacostia R | Prince George's | 99.1 ft | 7,399 | 1931 |
| Md 144 over Evitts Creek | Allegany | 130.9 ft | 7,221 | 1966 |
| Hammonds Ferry Roa over Csx Railroad | Baltimore | 202.1 ft | 7,077 | 1961 |
| Governor Bridge Ro over Patuxent River | Prince George's | 117.5 ft | 7,068 | 1920 |
| West Lafayette AVE over Amtrak | Baltimore | 640.1 ft | 7,030 | 1931 |
| Patapsco Avenue WB over Patapsco River | Baltimore | 1653.9 ft | 7,000 | 1961 |
| Livingston Road over Piscataway Creek | Prince George's | 65.9 ft | 6,771 | 1932 |
| Brandywine Road over Piscataway Creek | Prince George's | 54.1 ft | 6,771 | 1955 |
| Shookstown Road over Carroll Creek | Frederick | 48.9 ft | 6,750 | 1911 |
| Bentalou ST over Csxt Railroad | Baltimore | 107.9 ft | 6,745 | 1965 |
| Sisson Street over Csx | Baltimore | 132.9 ft | 6,500 | 1914 |
| Patapsco Avenue EB over Patapsco River | Baltimore | 1653.9 ft | 6,300 | 1961 |
| Warren Road over Gunpowder Falls | Baltimore | 640.1 ft | 6,296 | 1923 |
| Waterview Avenue over Md-295 B/w Parkway Ramp | Baltimore | 75.1 ft | 6,246 | 1950 |
| Woodbourne Avenue over Herring Run | Baltimore | 94.2 ft | 6,214 | 1974 |
| Hurley Avenue over Watts Branch Tributary | Montgomery | 62.0 ft | 5,815 | 1969 |
| Browns Bridge Road over Patuxent River | Howard | 210.0 ft | 5,772 | 1953 |
| Livingston Road over Hunters Mill Branch | Prince George's | 46.9 ft | 5,600 | 1977 |
| Quince Orchard Roa over Muddy Branch | Montgomery | 33.1 ft | 5,297 | 1965 |
| Hospital Drive over Marley Creek | Anne Arundel | 53.1 ft | 5,095 | 1991 |
| Mechanics Valley R over Csx Railroad | Cecil | 142.1 ft | 4,734 | 1975 |
| Davis Road over Piney Branch | Charles | 60.0 ft | 4,644 | 2000 |
| Poplar Hill Road over Zekiah Swamp Run | Charles | 44.6 ft | 4,644 | 1969 |
| Stone Chapel Road over Little Pipe Creek | Carroll | 28.9 ft | 4,612 | 1930 |
| Madeley Lane over Trib To Patuxent River | Prince George's | 27.9 ft | 4,608 | 1962 |
| Jarrettsville Road over East Branch /winters Run | Harford | 27.9 ft | 4,308 | 1950 |
| Remington Avenue over Stoney Run | Baltimore | 23.0 ft | 4,280 | 1900 |
| Hookers Mill Road over Bynum Run | Harford | 92.8 ft | 3,986 | 1957 |
| Golden Ring Road over Stemmers Run | Baltimore | 46.9 ft | 3,982 | 1933 |
| Gilmor Street over I-170 | Baltimore | 188.0 ft | 3,618 | 1975 |
| Garrett Park Road over Rock Creek | Montgomery | 153.9 ft | 3,554 | 1965 |
| Franklintown Road over Gwynns Falls | Baltimore | 159.1 ft | 3,421 | 1970 |
| Tuckerman Street over Bald Hill Branch | Prince George's | 49.9 ft | 3,386 | 1963 |