| Clara Barton Parkw over Clara Barton Parkway (sb | Poor | 1409.1 ft | 40,057 | 1959 |
| Father Hurley Boul over Little Seneca Creek Trib | Poor | 44.9 ft | 33,220 | 1995 |
| West Gude Drive over I-270 | Poor | 253.9 ft | 30,343 | 1985 |
| Tuckerman Lane over Snakeden Branch | Poor | 27.9 ft | 19,882 | 1966 |
| Shady Grove RD EB over Csxt Railroad | Poor | 182.1 ft | 19,679 | 1976 |
| Seven Locks Road over Cabin John Creek Tributa | Poor | 22.0 ft | 18,184 | 1965 |
| Midcounty HWY & Mi over Mill Creek | Poor | 64.0 ft | 17,842 | 1984 |
| Southlawn Lane over Rock Creek | Poor | 32.5 ft | 16,792 | 1920 |
| Brink Road over Great Seneca Creek | Poor | 64.0 ft | 16,456 | 1936 |
| Ericsson Road over Clara Barton Parkway | Poor | 120.1 ft | 16,120 | 1962 |
| Greentree Road over Bulls Run | Poor | 24.9 ft | 10,816 | 1949 |
| Dennis Avenue over Sligo Creek Tributary | Poor | 34.1 ft | 8,590 | 1961 |
| Spring Street over Csxt Rr & Wmata Metro | Poor | 212.9 ft | 8,204 | 1968 |
| Hurley Avenue over Watts Branch Tributary | Poor | 62.0 ft | 5,815 | 1969 |
| Quince Orchard Roa over Muddy Branch | Poor | 33.1 ft | 5,297 | 1965 |
| Garrett Park Road over Rock Creek | Poor | 153.9 ft | 3,554 | 1965 |
| Rabbitt Road over Long Draught Branch | Poor | 29.9 ft | 1,329 | 1982 |
| Zion Road over Hawlings River | Poor | 22.0 ft | 1,075 | 1930 |
| Valleywood Drive over Josephs Branch | Poor | 42.0 ft | 706 | 1960 |
| Barnes Road over Bennett Creek | Poor | 38.4 ft | 608 | 1925 |
| Witex Road over Rock Run | Poor | 25.6 ft | 500 | 1980 |
| Schaeffer Road over Little Seneca Creek | Poor | 44.0 ft | 437 | 1925 |
| Hawkins Landing DR over Great Seneca Creek Tribu | Poor | 25.9 ft | 132 | 2002 |
| Howell Road over Booze Creek | Poor | 28.9 ft | 105 | 1959 |
| Mouth Of Monocacy over Little Monocacy River | Poor | 48.9 ft | 79 | 1971 |
| Is 270 over Old Farm Creek | Fair | 21.0 ft | 265,320 | 1958 |
| Is 270 over Tuckerman Lane | Fair | 103.0 ft | 265,320 | 1958 |
| Is 495 over Stoney Brook DR Rock CR | Fair | 362.9 ft | 242,821 | 1964 |
| Is 495 over Md 650 | Fair | 201.1 ft | 242,500 | 1963 |
| Is 270 & Cd Rds over Watts Branch | Fair | 27.9 ft | 239,460 | 1955 |
| Is 495 over Md 185 | Fair | 226.0 ft | 239,310 | 1964 |
| Is 495 over Kensington PKWY | Fair | 130.9 ft | 239,310 | 1964 |
| Is 495 over Potomac River | Fair | 1442.9 ft | 239,022 | 1963 |
| Is 495 over Cedar Lane | Fair | 107.0 ft | 238,050 | 1964 |
| Is 495 over Br Of Rock Creek | Fair | 22.0 ft | 238,050 | 1958 |
| Is 495 over Sligo Creek | Fair | 33.1 ft | 232,010 | 1960 |
| Is 495 over Sligo Creek Parkway | Fair | 112.9 ft | 232,010 | 1959 |
| Is 495 over Brunett Avenue | Fair | 143.0 ft | 232,010 | 1959 |
| Is 495 over Clara Barton Parkway EB | Fair | 360.9 ft | 228,218 | 1963 |
| Is 495 over Northwest Branch | Fair | 505.9 ft | 222,147 | 1967 |
| Is 270 over Is 370 And Ramp B | Fair | 311.0 ft | 216,270 | 1989 |
| Is 495 over Seven Locks RD | Fair | 154.9 ft | 214,005 | 1962 |
| Is 495 & Ramp K(4) over Is 495x & C J CR | Fair | 354.0 ft | 214,005 | 1962 |
| Is 495 over Macarthur BLVD Cb PKWY | Fair | 607.0 ft | 212,410 | 1963 |
| Is 270 over Md 117 | Fair | 123.0 ft | 171,940 | 1954 |
| Is 270 over Gr Seneca CR & Game Pre | Fair | 231.0 ft | 154,247 | 1954 |
| Is 270 over Md 124 | Fair | 173.9 ft | 154,247 | 1955 |
| Is 270 over Middlebrook Road | Fair | 145.0 ft | 133,720 | 1990 |
| Is 270 Ramp C over Is 270y Ramps B & B3 | Fair | 298.9 ft | 130,450 | 1958 |
| Is 495 Ol over Is 270y | Fair | 306.1 ft | 115,850 | 1996 |
| Is 270 over West Old Baltimore RD | Fair | 105.0 ft | 98,097 | 1954 |
| Is 270 over Little Seneca Creek | Fair | 42.0 ft | 98,097 | 1954 |
| Is 270 Nbr over Br Of Little Bennett Crk | Fair | 27.9 ft | 94,940 | 1952 |
| Is 370 EB over Is 370 Ramp B | Fair | 161.1 ft | 78,741 | 1989 |
| US 29 over Northwest Branch | Fair | 51.5 ft | 67,927 | 1920 |
| US 29 NB over Paint Branch | Fair | 365.2 ft | 66,948 | 1957 |
| US 29 SB over Paint Branch | Fair | 365.2 ft | 66,948 | 1957 |
| US 29 over Md 650 | Fair | 205.1 ft | 61,922 | 1957 |
| Randolph Road over Northwest Branch | Fair | 75.1 ft | 60,342 | 1976 |
| US 29 over Patuxent River | Fair | 524.0 ft | 57,304 | 1954 |
| Md 927 & Ramp D over Is 270 Ramp I | Fair | 37.1 ft | 57,252 | 1990 |
| US 29 over Sligo Creek | Fair | 23.0 ft | 55,302 | 1936 |
| Md 355 SB over Md 355 Ramp 1 | Fair | 139.1 ft | 55,020 | 1959 |
| Md 355 SB over Is 495 Ol | Fair | 326.1 ft | 55,020 | 1959 |
| Md 355 NB over Is 495 Ol | Fair | 264.1 ft | 55,020 | 1958 |
| Md 355 SB over Is 495 Il | Fair | 294.0 ft | 55,020 | 1959 |
| Md 355 NB over Is 495 Il & Ramp 5 | Fair | 232.0 ft | 55,020 | 1960 |
| Md 586 over Turkey Branch | Fair | 53.1 ft | 47,792 | 1955 |
| Md 28 & Ramp 6 over Watts Branch | Fair | 24.9 ft | 47,601 | 1955 |
| Is 270 SB over Is 495 Ol | Fair | 118.1 ft | 44,696 | 1990 |
| Md 190 over Booze Creek | Fair | 40.4 ft | 44,290 | 1962 |
| Md 185 over Csx Trans. | Fair | 116.1 ft | 42,252 | 1957 |
| Twinbrook Parkway over Csxt Rr & Wmata Metro | Fair | 165.0 ft | 41,919 | 1964 |
| Md 586 over Rock Creek | Fair | 104.0 ft | 41,271 | 1954 |
| Md 185 over Rock Creek | Fair | 174.9 ft | 40,845 | 1957 |
| Shady Grove Road over Is 270 & C-d Roads | Fair | 345.1 ft | 40,730 | 1987 |
| Nicholson Lane over Csxt Railroad | Fair | 79.4 ft | 38,971 | 2008 |
| Md 185 over Br Of Rock Creek | Fair | 42.0 ft | 38,552 | 1963 |
| Shady Grove Road over Mill Creek | Fair | 24.9 ft | 37,762 | 1975 |
| Md 586 over Branch Of Rock Creek | Fair | 21.0 ft | 37,752 | 1956 |
| Md 185 over Proposed Roadway | Fair | 306.1 ft | 36,532 | 1968 |
| Md 185 over Turkey Branch | Fair | 42.0 ft | 36,532 | 1969 |
| Md 929a over US 29 Future Ramp E | Fair | 28.9 ft | 36,072 | 2004 |
| Shady Grove RD WB over Csxt Railroad | Fair | 182.1 ft | 35,374 | 1976 |
| Md 355 over Csx Trans Mu 681 Mu 77 | Fair | 398.0 ft | 34,970 | 1987 |
| Md 28 over Branch Of Rock Creek | Fair | 41.0 ft | 34,390 | 1969 |
| East Randolph Road over Paint Branch | Fair | 96.1 ft | 34,092 | 1963 |
| Md 650 over Sligo Creek | Fair | 65.0 ft | 33,100 | 1935 |
| Democracy Boulevar over Cabin John Creek | Fair | 44.9 ft | 31,775 | 1967 |
| Md 200 (icc) EB over North Branch Rock Creek | Fair | 291.0 ft | 31,652 | 2010 |
| Md 200 (icc) WB over North Branch Rock Creek | Fair | 291.0 ft | 30,827 | 2010 |
| Seven Locks Road over Cabin John Creek | Fair | 44.9 ft | 30,260 | 1960 |
| Montgomery Village over Cabin Branch | Fair | 125.0 ft | 29,148 | 1972 |
| Montrose Parkway over Old Farm Creek Tributary | Fair | 27.6 ft | 28,776 | 2006 |
| Md 355 over Capital Crescent Trail | Fair | 65.9 ft | 28,620 | 1988 |
| Md 193 over Sligo Creek | Fair | 24.9 ft | 28,580 | 1932 |
| Md 28 over Csxt Wmata Ramp | Fair | 313.0 ft | 27,020 | 1981 |
| Md 410 over Branch Of Rock Creek | Fair | 27.9 ft | 26,931 | 1929 |
| Goshen Road over Whetstone Run Tributary | Fair | 24.0 ft | 26,801 | 1930 |
| Wootton Parkway over Cabin John Creek | Fair | 65.9 ft | 26,366 | 1991 |
| Md 28 over Is 270 & C-d Roads | Fair | 296.9 ft | 26,090 | 1955 |
| Md 28 WB over Rock Creek | Fair | 319.9 ft | 24,840 | 1970 |
| Muddy Branch Road over Muddy Branch | Fair | 42.0 ft | 24,785 | 1987 |
| Tuckerman Lane over Cabin John Creek | Fair | 59.1 ft | 24,539 | 1966 |
| East Gude Drive (e over Csxt Rr & Wmata Metro | Fair | 153.9 ft | 23,921 | 1989 |
| East Gude Drive (w over Csxt Rr & Wmata Metro | Fair | 189.0 ft | 23,918 | 1968 |
| Md 28 EB over Rock Creek | Fair | 319.9 ft | 23,866 | 1970 |
| Md 124 over Whetstone Run | Fair | 77.1 ft | 23,621 | 1986 |
| Crabbs Branch Way over Metro Access Road | Fair | 202.1 ft | 23,523 | 1983 |
| Randolph Road (eb) over Rock Creek | Fair | 82.0 ft | 23,434 | 1953 |
| Randolph Road (wb) over Rock Creek | Fair | 82.0 ft | 23,434 | 1951 |
| Bel Pre Road over Bel Pre Creek | Fair | 25.9 ft | 22,635 | 1955 |
| Wootton Parkway over Cabin John Creek Tributa | Fair | 28.9 ft | 22,236 | 1991 |
| Is 495x SB over Cabin John Creek | Fair | 253.0 ft | 22,160 | 1964 |
| Md 190 over Cabin John Creek | Fair | 95.1 ft | 22,022 | 1974 |
| Md 190 over Is 495 | Fair | 314.0 ft | 22,022 | 1962 |
| Deer Ridge Road over Md 119 | Fair | 174.9 ft | 21,111 | 1989 |
| Md 182 over Bel Pre Creek | Fair | 51.2 ft | 21,002 | 1991 |
| Goshen Road over Whetstone Run | Fair | 49.9 ft | 20,972 | 1986 |
| Redland Road over Csxt Rr & Wmata Metro | Fair | 232.9 ft | 20,246 | 1980 |
| Md 410 over Rock Creek | Fair | 200.1 ft | 20,224 | 1974 |
| Airpark Road over Rock Creek Tributary | Fair | 32.8 ft | 20,070 | 1994 |
| Is 495x over Booze Creek | Fair | 46.9 ft | 19,820 | 1964 |
| Is 495x over Cabin John Creek | Fair | 289.0 ft | 19,820 | 1964 |
| Is 495x NB over Cabin John Creek | Fair | 272.0 ft | 19,820 | 1963 |
| Brookville Road over Csxt Railroad | Fair | 124.0 ft | 19,611 | 1976 |
| Md 119 over Shady Branch | Fair | 32.2 ft | 19,551 | 1988 |
| Wootton Parkway over I-270 | Fair | 320.9 ft | 19,444 | 1990 |
| Md 320 over Sligo Creek | Fair | 44.9 ft | 19,392 | 1920 |
| Md 117 over Great Seneca Creek | Fair | 107.9 ft | 18,752 | 1951 |
| Md 117 over Gunners Branch | Fair | 24.9 ft | 18,752 | 1951 |
| Briggs Chaney Road over Md 200 (icc) | Fair | 276.6 ft | 18,193 | 2011 |
| Little Falls Parkw over Willet Branch | Fair | 24.0 ft | 17,373 | 1958 |
| Little Falls Parkw over Willet Branch | Fair | 45.9 ft | 17,283 | 1963 |
| Md 115 over Rock Creek | Fair | 36.1 ft | 16,981 | 1970 |
| Md 115 over North Br Of Rock Creek | Fair | 34.4 ft | 16,981 | 1917 |
| Briggs Chaney Road over Little Paint Branch Trib | Fair | 41.3 ft | 16,939 | 1994 |
| Little Falls Parkw over Willet Branch | Fair | 48.9 ft | 16,840 | 1958 |
| Democracy Boulevar over Buck Branch Tributary | Fair | 27.9 ft | 16,800 | 1989 |
| Democracy Boulevar over Buck Branch | Fair | 48.2 ft | 16,780 | 1988 |
| Little Falls Parkw over Little Falls Branch Trib | Fair | 34.1 ft | 16,691 | 1980 |
| Crabbs Branch Way over Crabbs Creek | Fair | 32.2 ft | 16,564 | 1982 |
| Macarthur Boulevar over Capital Crescent Trail | Fair | 28.5 ft | 16,435 | 1910 |
| Fernwood RD over Is 495 | Fair | 207.0 ft | 16,350 | 1962 |
| Clara Barton Parkw over Riverside Drive | Fair | 28.2 ft | 16,120 | 1961 |
| Clara Barton Parkw over Cabin John Creek & Cabin | Fair | 378.0 ft | 16,120 | 1963 |
| Clara Barton Parkw over Little Falls Branch | Fair | 59.4 ft | 16,120 | 1961 |
| Muddy Branch Road over Shady Branch | Fair | 42.0 ft | 15,653 | 1987 |
| Md 396 over Little Falls Branch | Fair | 29.9 ft | 15,581 | 1931 |
| Is 270 Ramp C(5) over Is 270; C-d Rds & Rp F/1 | Fair | 472.1 ft | 15,251 | 1990 |
| Md 190 over Watts Branch | Fair | 53.1 ft | 15,240 | 1949 |
| Wootton Parkway over Watts Branch | Fair | 113.8 ft | 14,951 | 1972 |
| Wootton Parkway over Watts Branch Tributary | Fair | 21.0 ft | 14,464 | 1971 |
| Briggs Chaney Road over Paint Branch | Fair | 47.9 ft | 13,855 | 1974 |
| Md 355 over Little Seneca Creek | Fair | 27.9 ft | 13,820 | 1922 |
| Is 495 Ramp E(10) over Cabin John Creek | Fair | 294.0 ft | 13,610 | 1964 |
| Is 370 Ramp F(1) over Is 270 C-d Rds & Rp C/5 | Fair | 298.9 ft | 13,596 | 1989 |
| Westlake Terrace-f over I-270 | Fair | 365.2 ft | 13,584 | 1994 |
| Nelson Street over Watts Branch | Fair | 30.8 ft | 13,576 | 1955 |
| Clara Barton PKWY over Rock Run | Fair | 509.8 ft | 13,090 | 1963 |
| Md 108 over Patuxent River | Fair | 85.0 ft | 12,871 | 1928 |
| Watkins Mill Road over Cabin Branch | Fair | 115.2 ft | 12,768 | 1990 |
| Tower Oaks Bouleva over Cabin John Creek | Fair | 32.2 ft | 12,480 | 1975 |
| Forest Glen Road over Sligo Creek | Fair | 28.9 ft | 12,353 | 1974 |
| Macarthur Blvd. over Cabin John Creek | Fair | 449.8 ft | 12,300 | 1863 |
| Fairland Road over Paint Branch | Fair | 124.0 ft | 12,190 | 1965 |
| Bonifant Road over Northwest Branch | Fair | 55.8 ft | 12,165 | 1971 |
| Glen Mill Road over Piney Branch | Fair | 28.9 ft | 12,144 | 1960 |
| Md 124 over Great Seneca Creek | Fair | 42.7 ft | 11,881 | 1989 |
| Forest Glen Road over Is 495 | Fair | 377.0 ft | 11,684 | 1964 |
| Md 124 over Goshen Branch | Fair | 22.0 ft | 11,560 | 1989 |
| Md 410 over Csxt Wmata | Fair | 100.1 ft | 11,472 | 1975 |
| Is 270 Ramp A(6) over Is 495 Ol | Fair | 136.2 ft | 11,255 | 1990 |
| Md 547 over Rock Creek | Fair | 52.2 ft | 10,982 | 1932 |
| Dennis Avenue over Sligo Creek | Fair | 72.5 ft | 10,971 | 1999 |
| Md 119 over Long Draught Branch | Fair | 182.1 ft | 10,766 | 1990 |
| Md 97 over Hawlings River | Fair | 33.1 ft | 10,740 | 1930 |
| Md 97 over Reddy Branch | Fair | 26.9 ft | 10,740 | 1927 |
| Edmonston Drive over Csxt Rr & Wmata Metro | Fair | 123.0 ft | 10,524 | 1981 |
| Bowie Mill Road over Rock Creek North Branch | Fair | 42.0 ft | 10,400 | 1959 |
| Md 191 over Is 495 & Thomas Branch | Fair | 342.8 ft | 10,370 | 1962 |
| Md 927-montrose RD over Is 270 & C-d Roads | Fair | 314.0 ft | 10,211 | 1988 |
| Md 182 over Batchellors Run | Fair | 28.9 ft | 9,850 | 1931 |
| Md 182 over Buckhorn Br | Fair | 23.0 ft | 9,850 | 1931 |
| Bureau Drive over Long Draught Branch | Fair | 38.1 ft | 9,562 | 1982 |
| Seven Locks Road over Cabin John Creek | Fair | 85.0 ft | 9,414 | 1980 |
| Redland Road over Crabbs Creek | Fair | 20.3 ft | 9,310 | 1981 |
| Md 189 over Is 270 & C-d Roads | Fair | 250.0 ft | 9,304 | 1988 |
| Beach Drive over Rock Creek Tributary | Fair | 20.3 ft | 8,841 | 1968 |
| Beach Drive over Rock Creek Tributary | Fair | 28.2 ft | 8,841 | 1968 |
| Beach Drive over Rock Creek | Fair | 153.9 ft | 8,742 | 1962 |
| Beach Drive over Rock Creek | Fair | 44.0 ft | 8,663 | 1966 |
| Beach Drive over Rock Creek Tributary | Fair | 44.9 ft | 8,611 | 1965 |
| Greentree RD over Is 495 | Fair | 237.9 ft | 8,600 | 1962 |
| Md 191 over Cabin John Creek | Fair | 27.9 ft | 8,530 | 1991 |
| Kemp Mill Road over Northwest Branch Tributa | Fair | 21.0 ft | 8,485 | 1964 |
| Glen Road over Watts Branch | Fair | 40.4 ft | 8,114 | 1930 |
| Md 650 over Hawlings River | Fair | 44.0 ft | 7,660 | 1929 |
| Baltimore Road over Rock Creek | Fair | 59.1 ft | 7,482 | 1911 |
| Md 117 over Little Seneca Creek | Fair | 57.1 ft | 7,457 | 1953 |
| Richter Farm Road over Little Seneca Creek Trib | Fair | 25.3 ft | 7,433 | 2000 |
| Jones Mill Road over Coquelin Run | Fair | 36.7 ft | 7,307 | 1949 |
| Md 109 over Little Bennett Creek | Fair | 65.0 ft | 7,232 | 1951 |
| Jones Mill Road over Rock Creek | Fair | 201.1 ft | 7,194 | 1969 |
| Stringtown Road over Little Seneca Creek Trib | Fair | 35.4 ft | 7,151 | 2017 |
| East Deer Park Dri over Csxt Railroad | Fair | 85.0 ft | 7,121 | 1945 |
| Crystal Rock Drive over Little Seneca Creek Trib | Fair | 32.5 ft | 7,114 | 1988 |
| Brighton Dam Road over Brighton Dam & Triadelph | Fair | 602.0 ft | 7,106 | 1944 |
| Is 495 SE Ramp over Clara Barton Pky & Canal | Fair | 439.0 ft | 7,021 | 1963 |
| Is 495 Ramp over Clara Barton PKWY Wbr | Fair | 220.1 ft | 7,000 | 1963 |
| Waring Station Roa over Csxt Railroad | Fair | 117.1 ft | 6,897 | 1986 |
| Beach Drive over Rock Creek | Fair | 154.9 ft | 6,789 | 1968 |
| Tilden Lane over Old Farm Creek | Fair | 23.0 ft | 6,533 | 1972 |
| Needwood Road over Rock Creek | Fair | 33.1 ft | 6,446 | 1965 |
| Scott Drive over Watts Branch | Fair | 27.9 ft | 6,213 | 1990 |
| Md 118 over Great Seneca Creek | Fair | 89.9 ft | 6,121 | 1931 |
| Maple Avenue over Sligo Creek | Fair | 45.6 ft | 6,024 | 1930 |
| Spartan Road over James Creek Tributary | Fair | 24.0 ft | 6,004 | 1990 |
| Fallsgrove Drive over Watts Branch Tributary | Fair | 24.0 ft | 5,896 | 2003 |
| Sligo Creek Parkwa over Sligo Creek Tributary | Fair | 22.0 ft | 5,886 | 1996 |
| Cashell Road over Williamsburg Run | Fair | 26.6 ft | 5,865 | 1972 |
| Md 107 over Dry Seneca Creek | Fair | 38.7 ft | 5,862 | 1992 |
| Decoverly Drive over Muddy Branch Tributary | Fair | 55.1 ft | 5,804 | 2006 |
| Md 117 over Bucklodge Branch | Fair | 33.1 ft | 5,572 | 1932 |
| Is 495 Ramp F(1) over Is 495 | Fair | 241.1 ft | 5,541 | 1964 |
| Skylark Road over Little Seneca Creek | Fair | 45.9 ft | 5,507 | 2006 |
| Md 28 over Br Of Dry Seneca Creek | Fair | 23.0 ft | 5,420 | 1954 |
| Ednor Road over Northwest Branch | Fair | 42.0 ft | 5,308 | 1990 |
| Morningwood Drive over Williamsburg Run Tributa | Fair | 37.4 ft | 5,113 | 1970 |
| Md 28 over Little Monocacy River | Fair | 40.0 ft | 5,050 | 1925 |
| Oaklyn Drive over Rock Run | Fair | 47.9 ft | 4,934 | 1989 |
| Glen Road over Piney Branch | Fair | 25.9 ft | 4,689 | 1935 |
| Kensington Parkway over Silver Creek | Fair | 20.0 ft | 4,601 | 1940 |
| Russett Road over Rock Creek Tributary | Fair | 23.6 ft | 4,597 | 1966 |
| Grosvenor Lane over Is 270 | Fair | 274.9 ft | 4,422 | 1958 |
| Riffle Ford Road over Great Seneca Creek | Fair | 55.1 ft | 4,131 | 1952 |
| Cavanaugh Drive over Piney Branch | Fair | 30.8 ft | 3,929 | 1993 |
| Kensington Parkway over Rock Creek | Fair | 103.3 ft | 3,813 | 1910 |
| Is 495 Ramp E over Kensington PKWY | Fair | 133.9 ft | 3,685 | 1964 |
| Peach Orchard Road over Paint Branch | Fair | 34.8 ft | 3,677 | 1990 |
| Monroe Street over Truck Street | Fair | 169.9 ft | 3,663 | 1996 |
| Md 190 over Muddy Branch | Fair | 49.9 ft | 3,592 | 1954 |
| Md 121 over Little Seneca Lake | Fair | 537.1 ft | 3,571 | 1984 |
| Old Baltimore Road over James Creek Tributary | Fair | 20.7 ft | 3,494 | 1985 |
| Kent Street over Silver Creek | Fair | 20.0 ft | 3,460 | 1940 |
| River Road over Seneca Creek | Fair | 126.0 ft | 3,284 | 1959 |
| Old Baltimore Road over James Creek Tributary | Fair | 30.8 ft | 3,273 | 1998 |
| Hawkins Creamery R over Great Seneca Creek | Fair | 30.8 ft | 3,045 | 1961 |
| Glen Road over Kilgour Branch | Fair | 28.2 ft | 2,961 | 1942 |
| Persimmon Tree RD over Is 495 | Fair | 223.1 ft | 2,910 | 1961 |
| Palmer Road South over Stone Lake Rd/parking Lt | Fair | 272.0 ft | 2,750 | 1981 |
| Palmer Road South over E Palmer RD Stoney Creek | Fair | 279.9 ft | 2,750 | 1981 |
| Persimmon Tree Roa over Congressional Cc Underpa | Fair | 20.3 ft | 2,685 | 1977 |
| Comus Road over Is 270 | Fair | 215.9 ft | 2,540 | 1952 |
| Preserve Parkway over Cabin John Creek | Fair | 43.0 ft | 2,450 | 2006 |
| Ambleside Drive over Watts Branch | Fair | 91.9 ft | 2,418 | 1970 |
| West Old Baltimore over Little Seneca Creek | Fair | 63.0 ft | 2,361 | 1934 |
| Partnership Road over Russell Branch | Fair | 25.9 ft | 2,298 | 1920 |
| Game Preserve Road over Whetstone Run | Fair | 33.8 ft | 2,086 | 1990 |
| Stokes Road over Stoney Creek | Fair | 23.3 ft | 2,000 | 1950 |
| Carderock Access C over Clara Barton Parkway | Fair | 117.8 ft | 2,000 | 1962 |
| Whites Ferry Road over Broad Run | Fair | 40.4 ft | 1,988 | 1931 |
| Flower Avenue over Sligo Creek | Fair | 35.8 ft | 1,774 | 1930 |
| Bethesda Church Ro over Bennett Creek | Fair | 32.2 ft | 1,771 | 1990 |
| Logan Drive over Rock Run | Fair | 23.0 ft | 1,657 | 1972 |
| Turkey Foot Road over Muddy Branch | Fair | 41.0 ft | 1,453 | 1968 |
| Is 495 NW Ramp over Macarthur Boulevard | Fair | 336.0 ft | 1,330 | 1963 |
| Martinsburg Road over Potomac River Tributary | Fair | 27.9 ft | 1,322 | 1925 |
| Cattail Road over Dry Seneca Creek | Fair | 63.0 ft | 1,239 | 1975 |
| Long Corner Road over Patuxent River | Fair | 48.9 ft | 1,216 | 1968 |
| Bexhill Drive over Silver Creek | Fair | 23.0 ft | 1,029 | 1985 |
| Haviland Mill Road over Hawlings River | Fair | 40.4 ft | 1,000 | 1926 |
| Greenway Drive over Little Falls Branch | Fair | 26.9 ft | 970 | 1962 |
| Barnesville Road over Little Monocacy River | Fair | 49.9 ft | 918 | 1940 |
| Rannoch Road over Minnehaha Branch | Fair | 21.0 ft | 897 | 1920 |
| Dayton Street over Sligo Creek Tributary | Fair | 24.0 ft | 836 | 1965 |
| Berryville Road over Seneca Creek Tributary | Fair | 33.1 ft | 821 | 1930 |
| Long Corner Road over Patuxent River Tributary | Fair | 24.0 ft | 821 | 1970 |
| Goldleaf Drive over Minnehaha Branch | Fair | 37.1 ft | 759 | 1985 |
| Brighton Dam Road over Reddy Branch | Fair | 27.9 ft | 743 | 1910 |
| Brighton Dam Road over Hawlings River | Fair | 32.2 ft | 740 | 1920 |
| Hipsley Mill Road over Patuxent River | Fair | 42.0 ft | 716 | 1973 |
| White Ground Road over Seneca Creek Tributary | Fair | 28.9 ft | 615 | 1925 |
| Howard Chapel Road over Haights Branch | Fair | 25.6 ft | 609 | 1963 |
| Laurie Drive over Hollywood Branch | Fair | 21.0 ft | 575 | 1965 |
| Kendale Road over Ken Branch | Fair | 20.7 ft | 571 | 2002 |
| Club Hollow Road over Broad Run | Fair | 28.9 ft | 540 | 1930 |
| Brimstone Academy over James Creek Tributary | Fair | 29.5 ft | 539 | 1988 |
| George Washington over North Branch Rock Creek | Fair | 28.2 ft | 518 | 1973 |
| E. Rixey Road over Stoney Creek | Fair | 25.9 ft | 500 | 1975 |
| East Montgomery Ro over Rockville Center Multipl | Fair | 474.1 ft | 500 | 1998 |
| Huntmaster Road over Goshen Branch | Fair | 61.0 ft | 480 | 1920 |
| Sugarland Road over Dry Seneca Creek | Fair | 56.1 ft | 455 | 1971 |
| Wildcat Road over Wildcat Branch | Fair | 32.2 ft | 445 | 1935 |
| River Road over Broad Run | Fair | 32.5 ft | 444 | 1911 |
| Granite Rock Road over Little Seneca Creek Trib | Fair | 30.8 ft | 425 | 2007 |
| Black Rock Road over Great Seneca Creek | Fair | 74.1 ft | 400 | 1965 |
| Purdum Road over Bennett Creek Tributary | Fair | 20.0 ft | 354 | 1975 |
| Big Woods Road over Little Monocacy River | Fair | 62.0 ft | 345 | 1919 |
| Middlebridge Drive over Bel Pre Creek | Fair | 62.7 ft | 315 | 1983 |
| Edwards Ferry Road over Broad Run | Fair | 23.0 ft | 312 | 1982 |
| Chandlee Mill Road over James Creek | Fair | 38.1 ft | 302 | 1972 |
| Crofton Hill Lane over Watts Branch Tributary | Fair | 41.0 ft | 300 | 1990 |
| Griffith Road over Hawlings River | Fair | 24.9 ft | 282 | 1920 |
| South Palmer Road over Parking Garage | Fair | 665.4 ft | 200 | 1980 |
| Woodfield School R over Great Seneca Creek | Fair | 33.1 ft | 169 | 1974 |
| Harris Road West over Little Monocacy River | Fair | 26.9 ft | 161 | 1925 |
| Lake Potomac Drive over Watts Branch | Fair | 184.1 ft | 139 | 1985 |
| Locbury Drive over Lake Churchill Tributary | Fair | 28.5 ft | 105 | 1992 |
| Founders Mill Driv over Mill Creek Tributary | Fair | 21.0 ft | 105 | 1983 |
| Hathaway Drive over Lutes Run | Fair | 24.9 ft | 104 | 1983 |
| Tackbrooke Drive over Rock Creek North Branch | Fair | 30.2 ft | 67 | 2002 |
| Hyattstown Mill Ro over Little Bennett Creek Tri | Fair | 25.6 ft | 62 | 2006 |
| Falstone Avenue over Little Falls Branch | Fair | 25.9 ft | 52 | 1965 |
| Parklawn Entrance over Rock Creek | Fair | 40.4 ft | 27 | 1950 |
| Harvest Square Cou over Buck Branch Tributary | Fair | 21.7 ft | 21 | 1987 |
| Is 495 over Md 97 | Good | 198.2 ft | 232,010 | 1960 |
| Is 495 over Sligo Creek Trail | Good | 73.2 ft | 232,010 | 2001 |
| Is 270y Hov Ramp over Is 270y Median | Good | 504.9 ft | 114,000 | 2003 |
| Is 495 over Md 187 (old Georgetown R | Good | 134.8 ft | 113,030 | 1962 |
| Is 370 & Ramp 9 over Csx/marc | Good | 149.9 ft | 87,390 | 1989 |
| Is 270 NB over Md 109 Little Bennett C | Good | 168.0 ft | 87,230 | 1950 |
| Is 270 SB over Md 109 Little Bennett C | Good | 168.0 ft | 87,230 | 1950 |
| Is 370 over Is 370 Ramp M | Good | 105.0 ft | 81,998 | 1988 |
| Is 370 over Md 355 | Good | 152.9 ft | 79,062 | 1989 |
| Is 370 Ebr over Crabbs Branch Way | Good | 88.9 ft | 78,741 | 2010 |
| Is 370 Wbr over Crabbs Branch Way | Good | 88.9 ft | 78,741 | 2010 |
| Is 370 over Oakmont Avenue | Good | 136.2 ft | 78,741 | 1989 |
| Md 200 over Mill Creek | Good | 42.0 ft | 68,500 | 2008 |
| Md 200 over Mill Creek Tributary | Good | 46.9 ft | 68,500 | 2008 |
| Montrose Road over Old Farm Creek | Good | 55.1 ft | 66,690 | 2008 |
| Md 200 (icc) over Rock Creek | Good | 305.1 ft | 62,479 | 2010 |
| Md 355 over Relocated Randolph Road | Good | 180.1 ft | 60,000 | 2009 |
| US 29 over Is 495 | Good | 254.9 ft | 56,842 | 1959 |
| Shady Grove Road over Is 370 | Good | 221.1 ft | 53,010 | 1989 |
| US 29 Nbr over Md 198 | Good | 214.9 ft | 49,203 | 2004 |
| US 29 Sbr over Md 198 | Good | 214.9 ft | 49,203 | 2002 |
| Md 28 over Br Of Watts Branch | Good | 40.7 ft | 47,601 | 1988 |
| Md 97 (georgia Av) over Randolph Road | Good | 65.6 ft | 46,114 | 2018 |
| Md 187 over Is 270 | Good | 221.1 ft | 45,401 | 2002 |
| Md 193 over Is 495 | Good | 298.9 ft | 44,000 | 1958 |
| Md 119 over Shady Branch | Good | 65.0 ft | 39,581 | 1988 |
| Is-370 Ebr over Is-370 Rp1 Md200 Rp7 | Good | 118.1 ft | 39,531 | 2010 |
| I-370 Wbr over Is-370 Rp1 Md200 Rp7 | Good | 118.1 ft | 39,531 | 2010 |
| Md 929a & Md 929b over US 29 | Good | 170.9 ft | 36,072 | 2006 |
| Md 390 over Csx Transportation | Good | 195.9 ft | 35,062 | 1958 |
| Md 119 over Muddy Branch | Good | 248.0 ft | 34,401 | 1988 |
| Sam Eig Highway over Muddy Branch Tributary | Good | 27.6 ft | 34,353 | 1991 |
| Md 200 (icc) EB over Northwest Branch | Good | 581.0 ft | 32,786 | 2010 |
| Md 200 (icc) EB over Bonifant RD & NW Br | Good | 892.1 ft | 32,786 | 2010 |
| Md 200 (icc) EB over Northwest Branch | Good | 1146.0 ft | 32,786 | 2010 |
| Md 200 (icc) WB over Northwest Branch | Good | 581.0 ft | 32,683 | 2010 |
| Md 200 (icc) WB over Bonifant RD & NW Branch | Good | 892.1 ft | 32,683 | 2010 |
| Md 200 (icc) WB over Northwest Branch | Good | 1146.0 ft | 32,683 | 2010 |
| Md 200 (icc) WB over Good Hope Tributary | Good | 597.1 ft | 32,064 | 2010 |
| Md 200 (icc) WB over Paint Branch | Good | 1267.1 ft | 32,064 | 2010 |
| Md 200 (icc) EB over Good Hope Tributary | Good | 597.1 ft | 31,755 | 2010 |
| Md 200 (icc) EB over Gum Springs & Paint Bran | Good | 1267.1 ft | 31,755 | 2010 |
| Md 200 (icc) EB over Shady Grove Road | Good | 142.7 ft | 31,652 | 2010 |
| Md 200 (icc) EB over Tributary Of Nbrc | Good | 297.9 ft | 31,652 | 2010 |
| New Hampshire AVE over Md 200 (icc) | Good | 174.9 ft | 31,575 | 2010 |
| Md 355 over Great Seneca Creek | Good | 288.1 ft | 31,050 | 1999 |
| Md 200 (icc) WB over Shady Grove Road | Good | 142.7 ft | 30,827 | 2010 |
| Md 200 (icc) WB over Tributary Of Nbrc | Good | 297.9 ft | 30,827 | 2010 |
| Wisconsin Avenue over Bethesda Metro Ped. Tunn | Good | 35.1 ft | 29,515 | 1984 |
| Montgomery Village over North Creek | Good | 25.9 ft | 29,148 | 1972 |
| Montrose Parkway over Old Farm Creek | Good | 88.9 ft | 28,776 | 2007 |
| Md 118 over Is 270 | Good | 319.9 ft | 28,651 | 1954 |
| Md 97 SB over Md 200 (icc) | Good | 255.9 ft | 27,660 | 2010 |
| Md 410 over Georgetown Branch Trail | Good | 163.1 ft | 26,061 | 1997 |
| Democracy BLVD over Is 270y | Good | 246.1 ft | 25,601 | 2003 |
| Goshen Road over Cabin Branch | Good | 54.1 ft | 25,587 | 2004 |
| Md 118 over Csx Transportation | Good | 142.1 ft | 25,451 | 1998 |
| Md 28 over Muddy Branch | Good | 37.4 ft | 24,594 | 2004 |
| Md 28 over Batchellors Run | Good | 33.1 ft | 24,340 | 1999 |
| Md 124 over Whetstone Run | Good | 118.1 ft | 23,940 | 1991 |
| Md 97 NB over Md 200 (icc) | Good | 255.9 ft | 23,218 | 2010 |
| Md 200 (icc) EB over Ramp NW | Good | 93.5 ft | 22,682 | 2011 |
| Montrose Road over Ramp To I-270 | Good | 59.1 ft | 22,375 | 1990 |
| Md 190 over Little Falls | Good | 25.9 ft | 22,152 | 1962 |
| Md 108 over Trib To James Creek | Good | 34.1 ft | 22,100 | 1994 |
| Md 28 over Buckhorn Run | Good | 27.9 ft | 21,671 | 2001 |
| Md 200 (icc) WB over US 29 & Ramp SE Nb&eb | Good | 363.8 ft | 21,574 | 2011 |
| Md 200 (icc) WB over Ramp NW | Good | 94.5 ft | 21,574 | 2011 |
| Md 200 (icc) EB over US 29 & Ramp SE Nb&eb | Good | 357.9 ft | 21,522 | 2011 |
| Norbeck RD & Norwo over Northwest Branch | Good | 87.9 ft | 20,695 | 2002 |
| Muncaster Mill RD over Md 200 (icc) | Good | 258.9 ft | 19,690 | 2010 |
| Wayne Avenue over Sligo Creek | Good | 75.1 ft | 19,450 | 1960 |
| Md 187b (rockledge over 1s 270 | Good | 173.9 ft | 19,205 | 2002 |
| Norbeck Road over Nursery Run | Good | 174.9 ft | 18,960 | 2002 |
| Norbeck RD (md28) over Md 200 (icc) | Good | 297.9 ft | 18,475 | 2010 |
| Co 141 (middlebroo over Gunners Branch | Good | 28.9 ft | 16,296 | 1959 |
| Is 270 Ramp C(5) over Is 370 & Ramp B | Good | 313.0 ft | 15,251 | 1988 |
| Muddy Branch RD EB over Is 270 & NB C-d Road | Good | 320.9 ft | 14,642 | 1989 |
| Muddy Branch RD WB over Is 270 & NB C-d Road | Good | 320.9 ft | 14,642 | 1989 |
| Layhill RD (md182) over Md 200 (icc) | Good | 231.0 ft | 14,607 | 2010 |
| Father Hurley Boul over Century Boulevard | Good | 188.0 ft | 14,319 | 1995 |
| Father Hurley Boul over I-270 | Good | 321.9 ft | 14,319 | 1995 |
| Is 370 Ramp F over Is 370 | Good | 306.1 ft | 14,302 | 1989 |
| Md 121 over Is 270 | Good | 294.9 ft | 13,714 | 1997 |
| Father Hurley Boul over Century Boulevard | Good | 188.0 ft | 13,713 | 1995 |
| Father Hurley Boul over I-270 | Good | 321.9 ft | 13,713 | 1995 |
| Brink Road over Goshen Branch Tributary | Good | 52.8 ft | 13,608 | 2007 |
| Cedar Lane over Rock Creek | Good | 171.9 ft | 13,424 | 1959 |
| Md 195 over Long Branch | Good | 38.1 ft | 13,190 | 2005 |
| Watkins Mill Road over Great Seneca Creek | Good | 274.9 ft | 12,760 | 1990 |
| Redland Road over Md 200 (icc) | Good | 268.0 ft | 12,649 | 2009 |
| Observation Drive over Little Seneca Creek | Good | 39.4 ft | 11,584 | 1994 |
| Md 28 over Seneca Creek | Good | 526.9 ft | 11,520 | 2000 |
| Briggs Chaney Road over US 29 | Good | 183.1 ft | 11,212 | 2007 |
| Md 119 over Great Seneca Creek | Good | 255.9 ft | 10,766 | 1989 |
| Md 97 over Reddy Branch | Good | 125.3 ft | 10,400 | 2022 |
| Md 119 over Great Seneca Creek | Good | 255.9 ft | 10,344 | 1989 |
| Md 119 over Long Draught Branch | Good | 186.0 ft | 10,344 | 1990 |
| Washingtonian Boul over Sam Eig Highway | Good | 180.1 ft | 9,998 | 1998 |
| Summit Avenue over Csxt Railroad | Good | 54.1 ft | 9,746 | 1996 |
| Old Columbia Pike over Md-200 & Ramps SW & En | Good | 382.9 ft | 9,633 | 2011 |
| Centerway Road over Cabin Branch Tributary | Good | 20.3 ft | 9,298 | 1971 |
| Seminary Road over Is 495 | Good | 360.6 ft | 9,275 | 1964 |
| Is 495 Ramp K(4) over Is 495x Nbr | Good | 205.1 ft | 8,755 | 1962 |
| Beach Drive over Silver Creek | Good | 49.9 ft | 8,611 | 2022 |
| Lyttonsville Place over Purple Line | Good | 124.0 ft | 8,542 | 2019 |
| Watkins Mill Road over Whetstone Run | Good | 209.0 ft | 8,397 | 1997 |
| Emory Lane over Md 200 (icc) | Good | 293.0 ft | 8,133 | 2010 |
| Muncaster Road over Rock Creek | Good | 63.6 ft | 7,803 | 2006 |
| Md 355 over Little Bennett Creek | Good | 112.5 ft | 7,540 | 1925 |
| Md 195 over Sligo CR PKWY & Sligo CR | Good | 226.0 ft | 7,500 | 1932 |
| Jones Mill Road over Purple Line / Capital CR | Good | 62.7 ft | 7,194 | 2024 |
| Snouffer School Ro over Cabin Branch | Good | 66.6 ft | 7,060 | 2020 |
| Is 270 Ramp L(1) over Gunners Branch | Good | 35.8 ft | 6,945 | 1989 |
| Longmead Crossing over Md 200 (icc) | Good | 222.1 ft | 6,790 | 2010 |
| Piney Meetinghouse over Watts Branch | Good | 73.2 ft | 6,724 | 2017 |
| Stoneybrook Drive over Csxt Railroad | Good | 74.1 ft | 6,654 | 2001 |
| Centurion Way over Sandy Branch | Good | 35.1 ft | 6,433 | 2000 |
| Snowden Farm Parkw over Little Seneca Creek | Good | 31.2 ft | 6,303 | 2011 |
| Snouffer School Ro over Cabin Branch | Good | 66.6 ft | 6,239 | 2020 |
| Ramp En over Md 200 (icc) Us29 Rp SE | Good | 1341.9 ft | 5,902 | 2011 |
| Md 119 over Gunners Br Csxt Rr | Good | 332.0 ft | 5,366 | 1987 |
| Md 119 over Gunners Br Csxt Rr | Good | 329.1 ft | 5,034 | 1987 |
| Notley Road over Md 200 (icc) | Good | 232.0 ft | 4,997 | 2010 |
| Sundown Road over Hawlings River | Good | 55.4 ft | 4,567 | 1996 |
| Snowden Farm Parkw over Little Seneca Creek Trib | Good | 25.3 ft | 4,305 | 2011 |
| Clarksburg Road over Little Bennett Creek Tri | Good | 31.5 ft | 4,210 | 1988 |
| Clarksburg Road over Little Bennett Creek | Good | 94.5 ft | 4,194 | 1998 |
| Clarksburg Road over Bennett Creek Tributary | Good | 44.0 ft | 4,123 | 2003 |
| Clarksburg Road over Bennett Creek | Good | 29.9 ft | 4,123 | 2011 |
| Linden Lane over Csxt Railroad | Good | 63.0 ft | 4,090 | 1996 |
| I-370 Ramp L(7) over I-370 Ramp M(3) | Good | 77.1 ft | 3,953 | 2010 |
| I-370 Ramp - B over Crabbs Branch Way | Good | 88.9 ft | 3,953 | 2009 |
| Diamondback Drive over Muddy Branch Tributary | Good | 32.2 ft | 3,932 | 1995 |
| Avery Road over Rock Creek | Good | 149.9 ft | 3,894 | 1994 |
| Century Boulevard over Little Seneca Creek Trib | Good | 53.1 ft | 3,720 | 2014 |
| Watts Branch Parkw over Watts Branch | Good | 40.4 ft | 3,704 | 1970 |
| Esworthy Road over Muddy Branch | Good | 87.9 ft | 3,639 | 1999 |
| Old Baltimore Road over James Creek | Good | 39.4 ft | 3,623 | 1998 |
| Foreman Boulevard over Little Seneca Creek Trib | Good | 58.1 ft | 3,500 | 2011 |
| Serpentine Way over Paint Branch Tributary | Good | 21.0 ft | 3,476 | 1975 |
| Victory Farm Drive over Whetstone Run Tributary | Good | 26.2 ft | 3,395 | 1981 |
| Longdraft Road over Long Draught Branch | Good | 21.0 ft | 3,200 | 1977 |
| Inwood Avenue over Sligo Creek Tributary | Good | 42.0 ft | 2,972 | 1956 |
| Preserve Parkway over Cabin John Creek Tributa | Good | 26.9 ft | 2,840 | 1999 |
| Gold Mine Road over Hawlings River | Good | 58.1 ft | 2,792 | 2019 |
| Fda Boulevard over Paint Branch Tributary | Good | 136.2 ft | 2,710 | 2010 |
| Ramp Ws & Wn over Ramp NW | Good | 123.4 ft | 2,706 | 2011 |
| Little Seneca Park over Little Seneca Creek | Good | 134.8 ft | 2,560 | 2014 |
| Little Seneca Park over Little Seneca Creek Trib | Good | 24.9 ft | 2,560 | 2011 |
| Md 200 (icc) Ramp over Md 200 (icc) Ramp SE | Good | 60.4 ft | 2,449 | 2010 |
| Ramp Es over Ramp SE | Good | 75.5 ft | 2,449 | 2011 |
| Md 200 Ramp Es over Md 200 (icc) Ramp SB | Good | 105.6 ft | 2,449 | 2010 |
| Ramp Ws over Md 200/us29 Ramp EB | Good | 1225.7 ft | 2,397 | 2011 |
| Ramp NW To Md200wb over Us29 Ramp Nb&se Md200 | Good | 404.2 ft | 2,294 | 2011 |
| West Old Baltimore over Cabin Branch | Good | 20.3 ft | 2,221 | 2016 |
| Watkins Mill Road over Csx Railroad | Good | 88.6 ft | 2,136 | 2006 |
| Whites Ferry Road over Broad Run Tributary | Good | 48.9 ft | 2,101 | 1998 |
| Game Preserve Road over Whetstone Run | Good | 27.9 ft | 1,982 | 1990 |
| Burning Tree Road over Booze Creek | Good | 40.0 ft | 1,938 | 2008 |
| Whites Ferry Road over Broad Run Tributary | Good | 45.9 ft | 1,907 | 2014 |
| Whites Ferry Road over Broad Run Tributary | Good | 24.0 ft | 1,836 | 2014 |
| Dorset Avenue over Willett Branch | Good | 24.0 ft | 1,744 | 1999 |
| Md 109 over Br Of Little Monocacy Ri | Good | 26.9 ft | 1,732 | 2003 |
| Park Valley Road over Sligo Creek | Good | 38.1 ft | 1,126 | 2019 |
| Olde Mill Run Road over Md200 (icc) | Good | 138.1 ft | 1,073 | 2010 |
| Jerusalem Road over Dry Seneca Creek | Good | 27.6 ft | 1,043 | 2013 |
| Industrial Drive over Is 370 | Good | 318.9 ft | 999 | 1989 |
| Dustin Road over US 29 | Good | 211.0 ft | 999 | 2003 |
| Needwood Road over Md 200 (icc) | Good | 222.1 ft | 760 | 2010 |
| Elmhirst Parkway over Rock Creek Tributary | Good | 20.7 ft | 718 | 2016 |
| Wickham Road over Rock Creek North Branch | Good | 30.8 ft | 684 | 2002 |
| White Ground Road over Bucklodge Branch | Good | 52.2 ft | 654 | 2012 |
| Howard Chapel Road over Patuxent River | Good | 65.0 ft | 609 | 2002 |
| Father Hurley Boul over Csxt Railroad | Good | 93.2 ft | 588 | 2010 |
| Pennyfield Lock Ro over Unnamed Tributary | Good | 35.1 ft | 529 | 2017 |
| Pyrite Lane over James Creek | Good | 35.1 ft | 518 | 2005 |
| Potomac Crest Driv over Snakeden Branch | Good | 29.9 ft | 513 | 1995 |
| Carnation Drive over Watts Branch Tributary | Good | 26.6 ft | 490 | 1969 |
| Peach Tree Road over Csxt Railroad | Good | 149.0 ft | 428 | 2000 |
| Wickham Road over Rock Creek North Branch | Good | 22.3 ft | 376 | 2002 |
| Mouth Of Monocacy over Csxt Railroad | Good | 92.8 ft | 365 | 2007 |
| Tivoli Lake Boulev over Bel Pre Creek | Good | 65.0 ft | 310 | 2017 |
| Ramp Wn To Us29 NB over Ramp NB To Briggs Chaney | Good | 221.1 ft | 309 | 2011 |
| Ramp Wn To Us29 NB over Md 200 Ramp NW | Good | 101.7 ft | 309 | 2011 |
| Upshire Circle over Shady Branch | Good | 29.9 ft | 274 | 1990 |
| Valley Road over Bulls Run | Good | 32.2 ft | 216 | 1964 |
| Bonny Brook Lane over Great Seneca Creek Tribu | Good | 21.7 ft | 200 | 2000 |
| Ranworth Drive over Little Seneca Creek Trib | Good | 25.9 ft | 162 | 1994 |
| Kinster Drive over Little Seneca Creek Trib | Good | 33.1 ft | 157 | 2018 |
| Montevideo Road over Dry Seneca Creek | Good | 52.8 ft | 150 | 1910 |
| Edison Park Drive over Truck Loading Docks | Good | 142.1 ft | 135 | 1968 |
| Dahlgren Road over Paint Branch | Good | 503.6 ft | 110 | 2009 |
| Homecrest Road over Northwest Branch Tributa | Good | 21.0 ft | 105 | 1972 |
| Brookside Visitors over Northwest Branch Tributa | Good | 24.0 ft | 55 | 1999 |
| Edwards Ferry Road over C&o Canal | Good | 42.0 ft | 50 | 2024 |
| Jeb Stuart Trail over Little Monocacy River Tr | Good | 24.0 ft | 23 | 2010 |
| Driveway Off Aintr over Watts Branch | Good | 60.0 ft | 20 | 2009 |
| Wheaton Claridge P over Unnamed Creek | Good | 33.5 ft | 6 | 2017 |
| Is 270 Ramp over Unnamed Trib To Seneca C | Good | 282.2 ft | 0 | 2019 |