| I-83 over Csx Mta Amtrak And Nor | Baltimore | 127,291 | 1959 | 1183.1 ft |
| I-83 over Jones Falls (mi. 7.1 To | Baltimore | 105,600 | 1959 | 1199.1 ft |
| Perring PKWY Ramp over Herring Run | Baltimore | 75,220 | 1965 | 203.1 ft |
| Russell Street Via over Ostend Street And Csx | Baltimore | 70,700 | 1951 | 1269.0 ft |
| Is 70 EB over US 11 | Washington | 62,680 | 1965 | 149.0 ft |
| Is 70 WB over US 11 | Washington | 62,680 | 1965 | 149.0 ft |
| Is 70 EB over Md 632 | Washington | 62,680 | 1966 | 175.9 ft |
| Is 70 WB over Md 632 | Washington | 62,680 | 1966 | 175.9 ft |
| Pulaski Highway over Herring Run | Baltimore | 58,858 | 1921 | 153.9 ft |
| Md 4 Wbr over Md 717 | Prince George's | 46,652 | 1959 | 91.9 ft |
| Russell Street over Csx | Baltimore | 46,276 | 1963 | 211.9 ft |
| Clara Barton Parkw over Clara Barton Parkway (sb | Montgomery | 40,057 | 1959 | 1409.1 ft |
| Is 70 Ramp A over Beaver Creek | Washington | 37,200 | 1968 | 158.1 ft |
| Father Hurley Boul over Little Seneca Creek Trib | Montgomery | 33,220 | 1995 | 44.9 ft |
| Oxon Hill Road over Broad Creek | Prince George's | 30,739 | 1963 | 128.9 ft |
| West Gude Drive over I-270 | Montgomery | 30,343 | 1985 | 253.9 ft |
| I-83 over Mta Light Rail | Baltimore | 29,900 | 1962 | 874.0 ft |
| Hanover Street over Csx | Baltimore | 28,030 | 1929 | 206.0 ft |
| Broening Highway over Colgate Creek | Baltimore | 27,231 | 1968 | 578.1 ft |
| US 40 Orleans Str over I-83 And City Streets | Baltimore | 23,831 | 1936 | 1728.0 ft |
| On Ramp 29th Stree over I-83 NB | Baltimore | 23,318 | 1959 | 340.9 ft |
| Cherry Hill Road over Little Paint Branch | Prince George's | 22,938 | 1966 | 109.9 ft |
| Halfway Boulevard over Norfolk Southern Railroa | Washington | 21,909 | 1967 | 125.0 ft |
| Rossville Boulevar over Amtrak Railroad And Orem | Baltimore | 20,575 | 1971 | 344.2 ft |
| US 1 over N Tollgate RD Ped Trail | Harford | 20,542 | 1963 | 110.9 ft |
| Baughmans Lane over Rock Creek | Frederick | 20,388 | 1970 | 43.0 ft |
| Md 26 over Liberty Reservoir | Carroll | 20,192 | 1954 | 1719.2 ft |
| Tuckerman Lane over Snakeden Branch | Montgomery | 19,882 | 1966 | 27.9 ft |
| Shady Grove RD EB over Csxt Railroad | Montgomery | 19,679 | 1976 | 182.1 ft |
| Sinclair Lane over Moores Run | Baltimore | 18,265 | 1962 | 86.0 ft |
| Seven Locks Road over Cabin John Creek Tributa | Montgomery | 18,184 | 1965 | 22.0 ft |
| Midcounty HWY & Mi over Mill Creek | Montgomery | 17,842 | 1984 | 64.0 ft |
| Southlawn Lane over Rock Creek | Montgomery | 16,792 | 1920 | 32.5 ft |
| Monroe Street Ramp over Csx | Baltimore | 16,520 | 1963 | 207.0 ft |
| Old Court Road over Gwynns Falls And Mta Met | Baltimore | 16,498 | 1961 | 382.9 ft |
| Brink Road over Great Seneca Creek | Montgomery | 16,456 | 1936 | 64.0 ft |
| Harry S Truman Dri over Southwest Branch | Prince George's | 16,141 | 1974 | 86.9 ft |
| Ericsson Road over Clara Barton Parkway | Montgomery | 16,120 | 1962 | 120.1 ft |
| Naylor Mill Road over Naylors Pond Stream | Wicomico | 15,353 | 1963 | 59.4 ft |
| Hawkins Point Road over Csx | Baltimore | 15,177 | 1930 | 99.1 ft |
| Hanover Street over Middle Branch | Baltimore | 14,220 | 1916 | 2023.0 ft |
| Temple Hill Road over Tinkers Creek | Prince George's | 13,216 | 1960 | 40.0 ft |
| Mill Street over Wicomico River East Bran | Wicomico | 12,237 | 1958 | 121.1 ft |
| Peninsula Expressw over Csx Railroad | Baltimore | 11,183 | 1960 | 245.1 ft |
| Peninsula Expressw over Csx Railroad | Baltimore | 11,183 | 1960 | 245.1 ft |
| Tamar Drive over Unnamed Stream | Howard | 10,941 | 1970 | 53.8 ft |
| Broken Land Parkwa over Trib To Little Patuxent | Howard | 10,830 | 1972 | 48.9 ft |
| Greentree Road over Bulls Run | Montgomery | 10,816 | 1949 | 24.9 ft |
| Radecke Avenue over Moores Run | Baltimore | 10,737 | 1930 | 36.1 ft |
| Harford Road over Csx Railroad | Baltimore | 10,713 | 1900 | 25.9 ft |
| Greenmount Avenue over Csx Railroad | Baltimore | 10,713 | 1914 | 26.9 ft |
| US 522 over Potomac Riv Csx Trans. | Washington | 10,550 | 1937 | 2577.1 ft |
| Kelly Avenue over I-83 Jones Falls & Mta | Baltimore | 10,400 | 1925 | 789.0 ft |
| Abingdon Road over Csx Railroad | Harford | 10,242 | 1940 | 199.1 ft |
| 41st Street over I-83 And Jones Falls | Baltimore | 10,157 | 1930 | 1237.9 ft |
| Nasa Access Road over Baltimore-washington Par | Prince George's | 10,000 | 1966 | 380.9 ft |
| Frederick Road over Hunting Creek | Frederick | 9,402 | 1928 | 67.9 ft |
| Campus Drive over Northeast Branch | Prince George's | 8,781 | 1964 | 140.1 ft |
| Columbia Road over Plumtree Branch | Howard | 8,641 | 1987 | 49.2 ft |
| Dennis Avenue over Sligo Creek Tributary | Montgomery | 8,590 | 1961 | 34.1 ft |
| Spring Street over Csxt Rr & Wmata Metro | Montgomery | 8,204 | 1968 | 212.9 ft |
| King Avenue over Tributary To White Marsh | Baltimore | 8,126 | 1978 | 42.3 ft |
| Md 5 over Hilton Run | St. Mary's | 8,010 | 1936 | 34.1 ft |
| Moravia RD Ramp E over Pulaski Highway | Baltimore | 7,760 | 1956 | 236.9 ft |
| Glen Arm Road over Long Green Creek | Baltimore | 7,740 | 1987 | 77.1 ft |
| Tufton Avenue over Waterspout Run | Baltimore | 7,735 | 1920 | 23.0 ft |
| Lansdowne Boulevar over Csx Railroad | Baltimore | 7,620 | 1964 | 164.0 ft |
| Riverdale Road over NE Branch Of Anacostia R | Prince George's | 7,399 | 1931 | 99.1 ft |
| Md 144 over Evitts Creek | Allegany | 7,221 | 1966 | 130.9 ft |
| Hammonds Ferry Roa over Csx Railroad | Baltimore | 7,077 | 1961 | 202.1 ft |
| Governor Bridge Ro over Patuxent River | Prince George's | 7,068 | 1920 | 117.5 ft |
| West Lafayette AVE over Amtrak | Baltimore | 7,030 | 1931 | 640.1 ft |
| Patapsco Avenue WB over Patapsco River | Baltimore | 7,000 | 1961 | 1653.9 ft |
| Livingston Road over Piscataway Creek | Prince George's | 6,771 | 1932 | 65.9 ft |
| Brandywine Road over Piscataway Creek | Prince George's | 6,771 | 1955 | 54.1 ft |
| Shookstown Road over Carroll Creek | Frederick | 6,750 | 1911 | 48.9 ft |
| Bentalou ST over Csxt Railroad | Baltimore | 6,745 | 1965 | 107.9 ft |
| Sisson Street over Csx | Baltimore | 6,500 | 1914 | 132.9 ft |
| Patapsco Avenue EB over Patapsco River | Baltimore | 6,300 | 1961 | 1653.9 ft |
| Warren Road over Gunpowder Falls | Baltimore | 6,296 | 1923 | 640.1 ft |
| Waterview Avenue over Md-295 B/w Parkway Ramp | Baltimore | 6,246 | 1950 | 75.1 ft |
| Woodbourne Avenue over Herring Run | Baltimore | 6,214 | 1974 | 94.2 ft |
| Hurley Avenue over Watts Branch Tributary | Montgomery | 5,815 | 1969 | 62.0 ft |
| Browns Bridge Road over Patuxent River | Howard | 5,772 | 1953 | 210.0 ft |
| Livingston Road over Hunters Mill Branch | Prince George's | 5,600 | 1977 | 46.9 ft |
| Quince Orchard Roa over Muddy Branch | Montgomery | 5,297 | 1965 | 33.1 ft |
| Hospital Drive over Marley Creek | Anne Arundel | 5,095 | 1991 | 53.1 ft |
| Mechanics Valley R over Csx Railroad | Cecil | 4,734 | 1975 | 142.1 ft |
| Davis Road over Piney Branch | Charles | 4,644 | 2000 | 60.0 ft |
| Poplar Hill Road over Zekiah Swamp Run | Charles | 4,644 | 1969 | 44.6 ft |
| Stone Chapel Road over Little Pipe Creek | Carroll | 4,612 | 1930 | 28.9 ft |
| Madeley Lane over Trib To Patuxent River | Prince George's | 4,608 | 1962 | 27.9 ft |
| Jarrettsville Road over East Branch /winters Run | Harford | 4,308 | 1950 | 27.9 ft |
| Remington Avenue over Stoney Run | Baltimore | 4,280 | 1900 | 23.0 ft |
| Hookers Mill Road over Bynum Run | Harford | 3,986 | 1957 | 92.8 ft |
| Golden Ring Road over Stemmers Run | Baltimore | 3,982 | 1933 | 46.9 ft |
| Gilmor Street over I-170 | Baltimore | 3,618 | 1975 | 188.0 ft |
| Garrett Park Road over Rock Creek | Montgomery | 3,554 | 1965 | 153.9 ft |
| Franklintown Road over Gwynns Falls | Baltimore | 3,421 | 1970 | 159.1 ft |
| Tuckerman Street over Bald Hill Branch | Prince George's | 3,386 | 1963 | 49.9 ft |
| Old Denton Road over Faulkner Branch | Caroline | 2,799 | 1963 | 90.9 ft |
| Fort Avenue over Csx | Baltimore | 2,755 | 1923 | 618.1 ft |
| Fairview Avenue over Carroll Creek | Frederick | 2,674 | 1963 | 65.0 ft |
| Sparks Road over Gunpowder Falls | Baltimore | 2,589 | 1888 | 178.1 ft |
| Ilchester Road over Bonnie Branch | Howard | 2,588 | 1945 | 23.0 ft |
| Dogwood Road over Dogwood Run | Baltimore | 2,370 | 1929 | 76.1 ft |
| Lynn Burke Road over Church Branch | Frederick | 2,175 | 1965 | 38.1 ft |
| Md 136 over Falling Branch | Harford | 2,161 | 1931 | 47.9 ft |
| Seneca Drive over Beaver Run Branch | Howard | 1,985 | 1960 | 34.4 ft |
| Upper Beckleysvill over Murphy Run | Carroll | 1,745 | 1960 | 24.6 ft |
| Powhatan Street over Brier Ditch | Prince George's | 1,672 | 1975 | 37.1 ft |
| US 219 over Youghiogheny River | Garrett | 1,660 | 1900 | 23.0 ft |
| Grier Nursery Road over Deer Creek | Harford | 1,660 | 1955 | 166.0 ft |
| Mohrs Lane over Csx Railroad | Baltimore | 1,600 | 1912 | 145.0 ft |
| Daisy Road over Little Cattail Creek | Howard | 1,525 | 1935 | 31.8 ft |
| Bryantown Road over Mill Dam Run | Charles | 1,497 | 1933 | 36.1 ft |
| Pfefferkorn Road over Middle Patuxent River | Howard | 1,454 | 1935 | 36.1 ft |
| Henryton Road over Trib To S Br Patapsco R | Howard | 1,427 | 1925 | 47.6 ft |
| Dogstreet Road over Dog Creek | Washington | 1,408 | 1940 | 34.1 ft |
| Rabbitt Road over Long Draught Branch | Montgomery | 1,329 | 1982 | 29.9 ft |
| Md 36 over Jennings Run | Allegany | 1,320 | 1987 | 38.4 ft |
| Third Street over Little Youghiogheny Rive | Garrett | 1,310 | 1968 | 140.1 ft |
| Celestial Lane over Swanson Creek | Charles | 1,228 | 1992 | 49.9 ft |
| Md 144 over Town Creek | Allegany | 1,121 | 1957 | 199.1 ft |
| Grabenstein Road over Elk Lick Run | Allegany | 1,075 | 1940 | 24.0 ft |
| Zion Road over Hawlings River | Montgomery | 1,075 | 1930 | 22.0 ft |
| Opossumtown Pike over Big Tuscarora Creek | Frederick | 1,070 | 1988 | 39.0 ft |
| Union Chapel Road over Cattail Creek | Howard | 1,052 | 1955 | 71.5 ft |
| Frazier Neck Road over Little Creek | Caroline | 1,015 | 1994 | 35.1 ft |
| Green Spring Road over North Branch Of Potomac | Allegany | 959 | 1937 | 314.0 ft |
| Liberty Grove Road over Rock Run Creek | Cecil | 918 | 1940 | 23.3 ft |
| Three Bridges Road over Burnt Mill Branch | Wicomico | 897 | 1967 | 68.9 ft |
| Brethren Church RD over Catoctin Creek | Frederick | 851 | 1986 | 61.0 ft |
| Alcona Street over Bald Hill Branch | Prince George's | 836 | 1967 | 65.9 ft |
| Tunis Mills Road over Leeds Creek | Talbot | 820 | 1963 | 346.1 ft |
| Glenville Road over Mill Brook | Harford | 816 | 1930 | 38.1 ft |
| Rock AVE over Midway Branch | Anne Arundel | 800 | 1984 | 52.5 ft |
| Hessong Bridge RD over Fishing Creek | Frederick | 761 | 1931 | 88.9 ft |
| Harris Mill Road over Little Deer Creek | Baltimore | 734 | 1920 | 30.8 ft |
| Valleywood Drive over Josephs Branch | Montgomery | 706 | 1960 | 42.0 ft |
| Stablers Church Ro over Little Falls | Baltimore | 690 | 1975 | 57.1 ft |
| Yarrowsburg Road over Israel Creek | Washington | 687 | 1940 | 24.0 ft |
| New Row Road over Dutch Hollow Run | Allegany | 669 | 1935 | 28.9 ft |
| Trinity Church RD over Gilbert Swamp Run | Charles | 656 | 1927 | 37.1 ft |
| State Park Road over Cherry Creek | Garrett | 655 | 1970 | 25.9 ft |
| Mckendree Road over Lyons Creek | Anne Arundel | 623 | 1965 | 33.8 ft |
| Barnes Road over Bennett Creek | Montgomery | 608 | 1925 | 38.4 ft |
| Oconnor Road over Deep Run | Anne Arundel | 599 | 1944 | 27.9 ft |
| Trappe Church Road over Hollands Branch | Harford | 591 | 1952 | 32.2 ft |
| Double Hill Road over Watts Creek | Caroline | 570 | 1913 | 34.1 ft |
| Smithville Road over Sullivan Branch | Caroline | 561 | 1946 | 35.1 ft |
| Piney Grove Road over Csx Railroad | Baltimore | 551 | 1907 | 45.9 ft |
| Walker Road over Little Falls | Baltimore | 548 | 1915 | 43.0 ft |
| Summer Hollow LN over Trib To Little Patuxent | Howard | 542 | 1972 | 25.9 ft |
| Bloomery Road over Marshyhope Creek | Caroline | 540 | 1951 | 38.1 ft |
| Roxbury Road over Beaver Creek | Washington | 533 | 1920 | 66.6 ft |
| Taylors Landing Ac over C&o Canal | Washington | 530 | 1969 | 41.7 ft |
| Stafford Road over Buck Branch | Harford | 508 | 1980 | 33.1 ft |
| Witex Road over Rock Run | Montgomery | 500 | 1980 | 25.6 ft |
| Wesley Lane over Tributary To Deep Run | Howard | 500 | 1972 | 48.2 ft |
| High Bridge Road over Townsend/centreville Rr | Queen Anne's | 500 | 1914 | 90.9 ft |
| Schaeffer Road over Little Seneca Creek | Montgomery | 437 | 1925 | 44.0 ft |
| Maple Grove Road over Casselman River | Garrett | 413 | 1926 | 56.4 ft |
| Sang Run Road over Youghiogheny River | Garrett | 402 | 1955 | 222.8 ft |
| Brown Road over Roaring Run | Carroll | 395 | 1985 | 36.1 ft |
| Lily Pons Road over Locust Run | Frederick | 394 | 1977 | 21.0 ft |
| Poffenberger Road over Catoctin Creek | Frederick | 390 | 1878 | 126.0 ft |
| Mantua Mill Road over Deadman Run | Baltimore | 388 | 1930 | 44.9 ft |
| Friendsville - Add over Mill Run | Garrett | 345 | 1950 | 43.0 ft |
| Old Kiln Road over Little Owens Creek | Frederick | 338 | 1975 | 45.9 ft |
| Quarter Staff Road over Trib To Little Patuxent | Howard | 325 | 1972 | 35.1 ft |
| Clipper Mill Road over Prettyboy Reservoir | Baltimore | 311 | 1931 | 376.0 ft |
| Wheatley Road over West Branch | Cecil | 309 | 1966 | 34.1 ft |
| Granite Avenue over Rock Run Creek | Cecil | 309 | 1930 | 32.2 ft |
| Black Ankle Road over Talbot Branch | Frederick | 278 | 1979 | 28.9 ft |
| Waste Gate Road over Nassawango Creek | Wicomico | 272 | 1986 | 33.1 ft |
| Mummaford Road over Monocacy River | Carroll | 268 | 1911 | 229.0 ft |
| Morgnec Road over Trib To Chester River | Kent | 265 | 1928 | 40.7 ft |
| Lambson Forest Roa over Mills Branch | Kent | 265 | 1975 | 22.0 ft |
| Old Mt Pleasant RD over Evitts Creek | Allegany | 244 | 1952 | 86.6 ft |
| Hancock Run Road over Hancock Run | Charles | 240 | 1970 | 28.9 ft |
| Kepner Court over Tributary To Northeast B | Prince George's | 240 | 1960 | 22.0 ft |
| Mckinstry Mill RD over Little Pipe Creek | Carroll | 234 | 1900 | 39.4 ft |
| Snyders Landing Ac over C&o Canal | Washington | 212 | 1969 | 42.0 ft |
| Old Kays Mill Road over Beaver Run | Carroll | 209 | 1974 | 45.9 ft |
| Snowy Creek Road over Snowy Creek | Garrett | 209 | 1957 | 80.4 ft |
| Elliott Island RD over Elliott Creek | Dorchester | 204 | 1970 | 128.0 ft |
| Wildwood Avenue over Tributary To Herring Run | Baltimore | 200 | 1960 | 22.0 ft |
| New Bridge Road over Chicamacomico River | Dorchester | 184 | 1981 | 182.1 ft |
| Hornets Nest Road over Friends Creek | Frederick | 179 | 1981 | 39.0 ft |
| Appletown Road over Tributary Of Dog Creek | Washington | 172 | 1920 | 24.6 ft |
| Patapsco Road over East Br Patapsco River | Carroll | 171 | 1900 | 40.4 ft |
| Old Landover Road over Beaverdam Creek | Prince George's | 163 | 1966 | 50.9 ft |
| Hughes Shop Road over Bear Branch | Carroll | 152 | 1974 | 55.1 ft |
| Cornfield Harbor D over Point Lookout Creek | St. Mary's | 150 | 1970 | 41.0 ft |
| Marumsco Road over Marumsco Creek | Somerset | 141 | 1950 | 99.4 ft |
| Stines Store Road over Gilbert Swamp Run | Charles | 137 | 1933 | 97.1 ft |
| Hawkins Landing DR over Great Seneca Creek Tribu | Montgomery | 132 | 2002 | 25.9 ft |
| River Road over Casselman River | Garrett | 130 | 1885 | 86.0 ft |
| Old Morgantown Roa over Buffalo Run | Garrett | 122 | 1919 | 29.9 ft |