| I 93 over St 60 Eb/salem St | 1961 | 266,500 | Fair |
| I 93 over St 60 Wb/salem St | 1961 | 266,500 | Fair |
| I 93 over Water Mystic River | 1963 | 250,350 | Fair |
| I 93 over Hwy Valley St & Fllswy | 1961 | 210,316 | Fair |
| I 93 over Hwy Montvale Ave | 1958 | 208,231 | Fair |
| I 93 over I 95 /ST128 | 1957 | 200,824 | Poor |
| I 95 /ST128 over Hwy Lincoln St | 1950 | 196,500 | Fair |
| I 93 over Hwy Webster St | 1961 | 194,827 | Fair |
| I 95 /ST128 over RR Mbta/bmrr | 1950 | 192,672 | Poor |
| I 93 over Other Tri Community Gree | 1958 | 190,000 | Fair |
| I 93 over RR Bmrr Spur (aband) | 1958 | 189,880 | Fair |
| I 93 over St 16 Myst Val Pky | 1960 | 182,420 | Poor |
| I 93 over Hwy Riverside Ave | 1961 | 179,680 | Fair |
| I 95 /ST128 over RR Mbta/bmrr | 1950 | 178,839 | Fair |
| I 93 over Hwy Fallon Road | 1958 | 176,618 | Fair |
| I 90 over Hwy Charles St | 1964 | 176,121 | Fair |
| I 95 /ST128 over Water Stony Brook | 1950 | 172,999 | Fair |
| I 95 /ST128 over Water Charles River | 1961 | 169,456 | Fair |
| I 93 over Hwy West St | 1959 | 158,200 | Fair |
| I 93 over Hwy Concord St | 1958 | 155,000 | Fair |
| I 95 /ST128 over Water Charles River | 1950 | 150,529 | Fair |
| I 95 /ST128 over Other Mdc Aqueduct | 1950 | 150,095 | Fair |
| I 95 /ST128 over Hwy Norumbega Rd | 1950 | 147,364 | Fair |
| I 93 NB over Hwy Vale St | 1958 | 145,580 | Fair |
| I 93 SB over Hwy Vale St | 1958 | 145,580 | Fair |
| I 95 /ST128 over RR Mbta/bmrr | 1950 | 144,478 | Fair |
| I 93 over St 28 & ST38 & Temple St | 1973 | 143,941 | Fair |
| I 95 /ST128 over Hwy Pleasure Island Rd | 1948 | 142,650 | Fair |
| I 95 ST128 over Hwy Quinobequin Rd | 1950 | 142,579 | Poor |
| I 90 over Other Aqdct at Wllsly St | 1957 | 134,822 | Fair |
| I 95 /ST128 over Hwy North Ave | 1950 | 134,371 | Fair |
| I 495 SB over Water River Meadow Brook | 1959 | 128,820 | Fair |
| I 95 /ST128 over ST129 EB Lowell St | 1949 | 128,500 | Fair |
| I 95 /ST128 over ST129 WB Main St | 1949 | 128,500 | Fair |
| I 95 /ST128 over RR Bmrr/mbta | 1948 | 127,837 | Fair |
| US 3 over Water River Meadow Brk | 1959 | 126,338 | Fair |
| I 95 /ST128 over Hwy Parker Rd | 1959 | 125,000 | Fair |
| I 93 over Hwy Shore Dr | 1973 | 123,134 | Fair |
| Hwy Oak St over I 90 | 1957 | 122,017 | Fair |
| I 90 over Water Aqdct at Shaylr Ln | 1957 | 122,017 | Fair |
| I 495 SB over Hwy Tadmuck Rd | 1961 | 120,395 | Fair |
| I 90 over Comb I 95 & Charles Riv | 1964 | 119,166 | Fair |
| I 495 NB over US 3 | 2004 | 118,965 | Fair |
| I 495 over Water Mill Pond | 1961 | 116,909 | Good |
| I 90 over RR CSX | 1957 | 114,872 | Poor |
| I 90 over RR Csx/mbta | 1964 | 113,830 | Fair |
| I 90 Ramps A & B over Other Mwra Aqueduct | 1957 | 109,700 | Fair |
| I 495 NB over Water River Meadow Brook | 1959 | 109,174 | Fair |
| I 90 over Water Sudbury River | 1957 | 108,318 | Fair |
| I 90 over RR Csx/mbta | 1965 | 106,825 | Fair |
| US 3 over Water Moores Canal | 1959 | 106,700 | Good |
| I 90 Ramps J & L over Other Mdc Aqueduct | 1957 | 105,000 | Fair |
| US 3 NB over Hwy Parkhurst Rd | 2004 | 100,800 | Fair |
| US 3 SB over Hwy Parkhurst Rd | 2004 | 100,800 | Fair |
| US 3 over Water Stony Brook | 1959 | 100,800 | Fair |
| Hwy French St over Water Merrimack Canal | 1960 | 99,300 | Fair |
| I 95 SB/ST128 SB over Hwy Winn St | 1949 | 99,185 | Fair |
| I 95 SB/ST128 SB over St 38 Wb/main St | 1949 | 97,395 | Good |
| I 95 SB/ST128 SB over St 38 Sb/main St | 1949 | 97,354 | Fair |
| I 95 SB/ST128 SB over Hwy Middlesex Tpk | 1962 | 96,637 | Fair |
| St 9 Boylston St over Tr Green Line D | 1905 | 96,206 | Poor |
| I 95 NB/ST128 NB over Hwy Middlesex Tpk | 1962 | 94,875 | Fair |
| I 95 SB/ST128 SB over St 3 A/cambridge St | 1950 | 93,600 | Poor |
| I 93 NB over St 28 Fellsway Wst | 1959 | 93,010 | Fair |
| I 95 NB/ST128 NB over Hwy S Bedford St | 1950 | 92,706 | Fair |
| I 95 SB/ST128 SB over Hwy S Bedford St | 1950 | 92,706 | Poor |
| I 95 SB/ST128 SB over Hwy Forest Park Rd | 1950 | 90,617 | Fair |
| I 95 NB/ST128 NB over St 3 A/cambridge St | 1950 | 89,900 | Fair |
| I 290 WB over I 495 | 1968 | 89,528 | Fair |
| I 495 SB over Hwy Golden Cove Rd | 1960 | 88,200 | Fair |
| Hwy Lowell Conn over Water River Meadow Brook | 1960 | 88,000 | Fair |
| I 93 SB over RR Mbta/bmrr | 1958 | 87,100 | Fair |
| US 3 SB over Water Concord River | 2004 | 86,400 | Good |
| I 90 WB over St 27 N Main St | 1957 | 84,899 | Fair |
| St 9 Boylston St over Hwy Quinobequin Rd | 1932 | 84,828 | Fair |
| I 93 SB over St 28 Fellsway Wst | 1959 | 84,600 | Fair |
| St 3 A/gorham St over I 495 | 1962 | 84,000 | Poor |
| I 95 NB/ST128 NB over Hwy Forest Park Rd | 1950 | 83,334 | Fair |
| St 2 over Hwy Dow Ave | 1967 | 82,857 | Fair |
| St 9 Boylston St over Hwy Centre St | 1932 | 82,758 | Fair |
| St 9 Boylston St over Hwy Chestnut St | 1932 | 82,758 | Fair |
| US 3 NB over Hwy Dunstable Rd | 2004 | 82,679 | Good |
| I 95 NB/ST128 NB over Hwy Winn St | 1949 | 82,490 | Fair |
| US 3 NB over Water Concord River | 2004 | 81,500 | Good |
| I 90 Ramps A & B over Water Charles River | 1957 | 80,100 | Poor |
| I 95 NB/ST128 NB over St 38 Wb/main St | 1949 | 80,004 | Fair |
| I 93 SB over Water Ipswich River | 1958 | 78,543 | Fair |
| US 3 SB over Hwy Dunstable Rd | 2004 | 77,900 | Good |
| I 93 NB over Water Ipswich River | 1958 | 76,634 | Fair |
| St 2 EB over Hwy Pleasant St | 1965 | 76,566 | Fair |
| I 95 NB/ST128 NB over St 38 Sb/main St | 1949 | 76,341 | Fair |
| I 290 over Water Assabet River | 1968 | 75,828 | Good |
| I 93 NB over RR Mbta/bmrr | 1959 | 73,300 | Fair |
| I 93 SB over RR Mbta/bmrr | 1959 | 71,877 | Fair |
| US 1 over Hwy Lynn St | 1937 | 70,180 | Fair |
| St 2 over I 95 /ST128 | 2016 | 70,000 | Good |
| I 495 SB over RR Pan Am | 1961 | 68,981 | Poor |
| I 495 SB over St 38 Main St | 1961 | 68,981 | Poor |
| US 3 SB over St 40 Groton Rd | 2004 | 68,922 | Fair |
| St 16 Rev Bch Pkwy over Comb Rivers Edge&mbta&o | 2018 | 68,300 | Good |
| I 90 WB over Hwy Wellesley St | 1957 | 68,163 | Fair |
| St 38 Main St over Water Mystic River | 1908 | 67,900 | Good |
| St 16 Washngton St over I 95 /ST128 | 1962 | 67,758 | Fair |
| I 90 EB over Hwy Indian Rock Road | 1957 | 67,521 | Fair |
| I 90 WB over Water Mdc Res 3 | 1957 | 67,038 | Good |
| I 90 EB over Hwy Ridgeway Rd | 1957 | 66,710 | Fair |
| I 90 WB over Hwy Ridgeway Rd | 1957 | 66,710 | Fair |
| I 495 NB over Hwy Golden Cove Rd | 1960 | 66,190 | Fair |
| I 495 NB over St 38 Main St | 1961 | 65,434 | Fair |
| St 16 Rev Bch Pkwy over Water Malden River | 2018 | 65,285 | Good |
| I 495 SB over ST133 Andover St | 1961 | 65,206 | Fair |
| I 90 WB over Hwy Indian Rock Road | 1957 | 65,074 | Fair |
| I 495 SB over Water Concord River | 2011 | 64,400 | Good |
| I 495 SB over Hwy Woburn St | 2011 | 64,355 | Good |
| St 28 Fellsway over Water Mystic River | 1935 | 64,248 | Fair |
| I 495 NB over Hwy Woburn St | 2011 | 64,233 | Good |
| I 495 NB over RR Pan Am | 1961 | 64,233 | Poor |
| I 495 SB over RR Mbta/bmrr | 2011 | 64,100 | Good |
| I 495 SB over Water Beaver Brook | 1962 | 64,006 | Fair |
| I 90 EB over Water Sudbury River | 1957 | 62,597 | Fair |
| I 495 NB over RR Mbta/bmrr | 2011 | 61,500 | Good |
| I 495 SB over US 3 | 2004 | 61,400 | Fair |
| I 495 NB over Water Concord River | 2011 | 61,200 | Good |
| I 495 NB over ST133 Andover St | 1961 | 60,988 | Poor |
| US 3 NB over Water Shawsheen River | 2004 | 60,000 | Good |
| US 3 SB over Hwy Westford Rd | 2004 | 60,000 | Good |
| US 3 SB over Water Shawsheen River | 2004 | 60,000 | Good |
| I 495 SB over St 2 | 2015 | 59,787 | Good |
| US 3 /ST2&16/ALWF over Hwy Alw Sta Access Rd | 1984 | 59,700 | Fair |
| I 495 SB over ST225 Concord Rd | 1959 | 59,452 | Fair |
| I 495 NB over St 2 | 2015 | 59,444 | Good |
| I 495 SB over Hwy Boston Rd | 1959 | 59,349 | Poor |
| US 3 SB over Hwy Farm Rd | 2004 | 59,224 | Fair |
| I 495 NB over ST110 Chelmsford St | 1960 | 58,760 | Fair |
| US 20 Eb/bstn Pst over I 495 | 1962 | 58,094 | Fair |
| St 2 over Tr Mnuteman Bp | 2004 | 58,000 | Good |
| I 93 NB over RR Mbta/bmrr | 1958 | 57,950 | Fair |
| I 90 WB over Water Sudbury River | 1957 | 57,526 | Fair |
| I 90 WB over Hwy Edgell Rd | 1957 | 57,032 | Fair |
| I 90 EB over St 27 N Main St | 1957 | 56,977 | Fair |
| I 90 Ramps over Comb I 95 & Charles Riv | 1957 | 56,670 | Fair |
| St 2 over Hwy Lake St | 1967 | 56,236 | Poor |
| I 495 NB over Water Beaver Brook | 1962 | 56,219 | Fair |
| ST110 /ST38 over Water Merrimack River | 1954 | 56,200 | Fair |
| I 495 NB over ST225 Concord Rd | 1959 | 56,013 | Fair |
| I 495 NB over Water Assabet River | 1963 | 55,989 | Poor |
| Hwy Lowell Conn over RR Mbta/bmrr | 1960 | 55,846 | Fair |
| Hwy Lowell Conn over Hwy Howard St | 1960 | 55,800 | Fair |
| I 90 EB over Hwy Wellesley St | 1957 | 55,702 | Fair |
| US 3 /ST2&16/ALWF over RR Mbta/bmrr | 1996 | 55,603 | Good |
| I 90 EB over Hwy Edgell Rd | 1957 | 55,581 | Fair |
| St 2 Concord Tpk over RR Mbta/bmrr | 1991 | 55,260 | Fair |
| I 495 SB over ST110 Chelmsford St | 1960 | 55,100 | Fair |
| I 495 SB over Hwy Donald Lynch Blvd | 1963 | 54,415 | Fair |
| US 3 NB over Hwy Farm Rd | 2004 | 53,663 | Fair |
| I 495 SB over ST135 Wood St | 1966 | 53,404 | Fair |
| I 495 NB over Hwy Boston Rd | 1959 | 53,253 | Poor |
| St 9 Boylston St over Water Hemlock Gorge | 1932 | 53,100 | Fair |
| I 90 WB over Hwy Central St | 1957 | 52,861 | Fair |
| I 90 WB over ST126 Concord St | 1957 | 52,861 | Fair |
| St 16 Rev Bch Pkwy over RR Mbta/bmrr | 1956 | 52,800 | Fair |
| I 90 EB over Hwy Central St | 1957 | 52,197 | Fair |
| I 90 EB over ST126 Concord St | 1957 | 52,197 | Fair |
| I 90 EB over Water Mdc Res 3 | 1957 | 52,197 | Good |
| I 90 Ex 117 In 13 over Hwy Speen St | 1957 | 52,165 | Fair |
| I 90 Ex 117 In 13 over St 30 Cochituate Rd | 1957 | 52,165 | Fair |
| St 9 /ST30/WRCSTR over Water Sudbury River | 2009 | 52,165 | Good |
| St 9 Worcester St over Water Lake Cochituate | 2007 | 52,165 | Good |
| US 3 NB over St 62 Burlington Rd | 2004 | 51,663 | Good |
| US 3 NB over St 40 Groton Rd | 2004 | 51,585 | Fair |
| St 9 Boylston St over Water Charles River | 1900 | 51,270 | Fair |
| US 3 NB over Hwy Main St | 2004 | 51,000 | Fair |
| US 3 SB over Hwy Main St | 2004 | 51,000 | Good |
| I 90 EB over ST135 Wood St | 1957 | 50,658 | Poor |
| US 3 SB over Hwy Richardson Rd | 2004 | 50,638 | Fair |
| US 3 SB over RR Bmrr | 2004 | 50,638 | Good |
| I 495 NB over Other Bruce Freeman Rail | 1959 | 50,600 | Fair |
| ST110 /RTE3A/CHMFD over RR Bmrr | 1971 | 50,300 | Fair |
| St 16 Washngton St over Tr Green Line D | 1850 | 50,300 | Fair |
| US 3 NB over Hwy Westford Rd | 2004 | 50,100 | Good |
| US 3 NB over Hwy Richardson Rd | 2004 | 49,476 | Good |
| US 3 NB over RR Bmrr | 2004 | 49,476 | Good |
| I 495 NB over Hwy River Rd | 1963 | 49,446 | Fair |
| I 90 WB over Other Cochituate Trail | 1957 | 48,609 | Fair |
| St 2 EB over Hwy Waltham St | 1965 | 48,500 | Fair |
| I 90 EB over Other Cochituate Trail | 1957 | 48,475 | Fair |
| I 495 NB over Hwy Donald Lynch Blvd | 1963 | 48,156 | Fair |
| I 495 NB over Hwy W Main St | 1966 | 48,152 | Poor |
| I 495 NB over ST135 Wood St | 1966 | 48,152 | Fair |
| I 495 NB over I 90 | 1965 | 48,021 | Poor |
| St 3 NB over US 3 SB Connector | 2004 | 48,000 | Good |
| I 495 SB over Hwy River Rd | 1963 | 47,879 | Fair |
| I 495 SB over Water Assabet River | 1963 | 47,879 | Poor |
| St 2 Elm St over Water Assabet River | 1904 | 47,800 | Fair |
| I 495 NB over RR Mbta/bmrr | 1959 | 47,280 | Good |
| St 2 Concord Tpk over RR Mbta/bmrr | 1988 | 46,900 | Fair |
| I 495 NB over Hwy Berlin Rd | 1963 | 46,783 | Fair |
| St 2 Concord Tpk over Water Sudbury River | 1934 | 46,700 | Poor |
| St 2 over Hwy Access Road | 2016 | 46,657 | Good |
| St 2 WB over Hwy Waltham St | 1965 | 46,400 | Fair |
| St 28 Mcgrath Hwy over Hwy Gilman St | 2016 | 46,200 | Good |
| I 495 SB over Other Bruce Freeman Rail | 1959 | 45,760 | Fair |
| Hwy Washngton St over I 95 /ST128 | 1961 | 45,000 | Fair |
| I 90 Ex 117 In 13 over I 90 | 1957 | 45,000 | Poor |
| I 90 Ramp D over St 30 South Av& I95 Rmps | 1957 | 45,000 | Fair |
| St 3 NB over Hwy Ledge Rd | 2004 | 44,423 | Fair |
| I 495 NB over Hwy Tadmuck Rd | 1961 | 43,917 | Poor |
| I 495 SB over RR Mbta/bmrr | 1959 | 43,698 | Good |
| St 2 over Water Nashoba Brook | 1951 | 43,300 | Fair |
| St 3 SB over Hwy Ledge Rd | 2004 | 43,149 | Fair |
| St 16 Myst Val Pky over I 93 | 1961 | 42,991 | Fair |
| St 2 over Hwy Foster St | 1950 | 42,826 | Fair |
| St 2 over RR Mbta/bmrr | 1950 | 42,826 | Fair |
| I 495 SB over Hwy Berlin Rd | 1963 | 42,765 | Poor |
| I 90 Rmp D Int 14 over Other Mdc Pipe@nrmbga Rd | 1956 | 42,700 | Fair |
| St 4 Bedford St over I 95 /ST128 | 1961 | 42,543 | Fair |
| St 9 Boylston St over Hwy Hammond Pond Pkwy | 1933 | 42,320 | Fair |
| St 3 SB over US 3 SB Connector | 2004 | 42,200 | Good |
| US 3 SB over ST110 Chelmsford St | 2004 | 42,155 | Fair |
| ST113 /ST3A/KENDLL over RR Bmrr | 1930 | 42,000 | Fair |
| St 99 Sb/main St over RR Mbta/bmrr/csx | 1954 | 42,000 | Fair |
| US 3 Memorial Dr over RR CSX | 1906 | 41,897 | Fair |
| St 9 Worcester Rd over Water Reservoir Outlet | 2016 | 41,604 | Good |
| St 16 Myst Val Pky over Comb Mystic R & Ped/bky | 1988 | 41,250 | Fair |
| Hwy Land Blvd over Water Lechmere Canal | 1986 | 40,991 | Fair |
| Hwy Winter St over I 95 /ST128 | 2011 | 40,700 | Fair |
| Hwy Lwll Conn NB over I 495 Ramp B-11 | 1959 | 40,019 | Fair |
| US 90 Ramp D over Hwy Norumbega Rd | 1957 | 39,700 | Fair |
| St 16 Myst Val Pky over St 38 Main St | 1961 | 39,300 | Fair |
| Hwy Montvale Ave over Water Aberjona River | 1958 | 39,100 | Fair |
| I 290 WB over Hwy Bigelow St | 1968 | 38,956 | Fair |
| I 290 EB over Hwy Bigelow St | 1968 | 38,872 | Fair |
| US 3 SB over St 62 Burlington Rd | 2004 | 38,322 | Good |
| Hwy Main St over St 9 Worcester Rd | 1967 | 38,300 | Fair |
| I 495 SB over Hwy W Main St | 1966 | 38,043 | Poor |
| I 90 Ramp J over I 90 | 1962 | 37,629 | Fair |
| St 2 WB over Hwy Pleasant St | 1965 | 37,400 | Fair |
| St 2 over Hwy Central St | 1950 | 37,218 | Fair |
| St 9 Worcester Rd over I 90 | 1957 | 37,124 | Fair |
| St 4 Great Rd over Water Shawsheen River | 1903 | 37,000 | Fair |
| St 60 Pleasant St over St 2 | 1967 | 36,700 | Poor |
| Hwy Mt Auburn St over Other Greenway M/u Path | 1955 | 36,600 | Fair |
| I 90 Ramp G over Other Mdc Aqueduct | 1962 | 36,206 | Poor |
| Hwy Lowell Conn over Hwy Thorndike St | 1960 | 35,900 | Fair |
| I 90 WB over ST135 Wood St | 1957 | 35,652 | Fair |
| Hwy Mishawum Rd over RR Mbta/bmrr | 1977 | 35,560 | Fair |
| ST128 Service Rd over Water Charles River | 1949 | 35,400 | Good |
| St 30 Comm Ave over Water Charles River | 1962 | 35,200 | Fair |
| Hwy NB Lowll Con over Hwy Indstrial Ave East | 1960 | 35,000 | Fair |
| Hwy SB Lowll Con over Hwy Indstrial Ave East | 1960 | 35,000 | Fair |
| Hwy Speen St SB over St 9 & Ramp A | 1977 | 34,773 | Poor |
| ST225 Groton Rd over Water Squannacook River | 1996 | 34,059 | Fair |
| St 16 Myst Val Pky over Water Mystic River | 1906 | 33,900 | Fair |
| Hwy Washngton St over Comb I 90 & Csx/mbta | 1964 | 33,750 | Fair |
| ST126 Concord St over St 9 Worcester Rd | 1931 | 33,571 | Good |
| St 4 North Rd over I 495 | 1959 | 33,500 | Fair |
| St 99 Sb/broadway over St 16 Rev Bch Pkwy | 1956 | 33,000 | Fair |
| St 30 South Ave over I 95 /ST128 | 1962 | 32,600 | Fair |
| St 62 Middlesex Av over I 93 | 1958 | 32,400 | Fair |
| St 28 Main St over Water Ipswich River | 1904 | 32,300 | Fair |
| Hwy Medford St over Water Malden River | 1976 | 32,100 | Fair |
| St 28 Mcgrath Hwy over RR Mbta/bmrr | 1926 | 32,000 | Poor |
| I 90 EB Off Ramp over Other Mdc Aqueduct | 1961 | 31,700 | Fair |
| Hwy Prospect St over Water Charles River | 1888 | 31,500 | Fair |
| Hwy Centre St over Comb I 90 & Csx/mbta | 1964 | 31,422 | Poor |
| St 28 Main St over Water Martins Brook | 1903 | 31,080 | Fair |
| I 290 EB over I 495 | 1968 | 30,965 | Fair |
| Hwy Montvale Ave over RR Mbta/bmrr | 1987 | 30,800 | Fair |
| I 90 Ramp On&off over I 495 | 1968 | 30,736 | Fair |
| Hwy Thorndike St over Water Pawtucket Canal | 1986 | 30,000 | Fair |
| Hwy Washngton St over Water Aberjona River | 1934 | 30,000 | Fair |
| US 20 Wb/weston St over I 95 /ST128 | 1960 | 29,822 | Fair |
| I 290 Ramp H over Hwy 85 Connector | 1978 | 29,749 | Fair |
| ST129 Richmond Rd over RR Mbta/bmrr | 1973 | 29,500 | Fair |
| I 95 NB Ramp over Other Mdc Aqueduct | 1957 | 29,482 | Fair |
| St 38 Main St over RR Bmrr | 1938 | 29,095 | Fair |
| ST129 Lowell St over Water Maple Meadow Brook | 2008 | 28,600 | Good |
| St 3 Nb/memorl Dr over St 3 SB to Longfllw Brg | 1957 | 28,450 | Fair |
| ST129 Lowell St over RR Mbta/bmrr | 1958 | 28,448 | Fair |
| Hwy Hammond Pd over Tr Green Line D | 1933 | 28,300 | Fair |
| St 28 Fellsway over RR Bmrr (abandoned) | 1850 | 28,190 | Fair |
| US 20 Main St over RR Mbta/bmrr | 1936 | 28,190 | Fair |
| Hwy Broadway over RR Mbta/bmrr | 2020 | 28,000 | Good |
| St 99 Nb/broadway over RR Mbta/bmrr/csx | 1956 | 28,000 | Fair |
| US 3 NB over ST110 Chelmsford St | 2004 | 27,931 | Fair |
| US 3 Cd NB over ST110 Chelmsford St | 2004 | 27,673 | Fair |
| US 3 Cd SB over ST110 Chelmsford St | 2004 | 27,673 | Fair |
| Hwy School St over Water Northern Canal | 1848 | 27,672 | Fair |
| Hwy Webster Ave over RR Mbta/bmrr | 1911 | 27,350 | Poor |
| Hwy Lakeview Ave over Water Beaver Brook | 1850 | 26,900 | Fair |
| St 62 Middlesex Av over Water Lubbers Brook | 2022 | 26,800 | Good |
| Hwy Dutton St over Water Western Canal | 1986 | 26,600 | Fair |
| St 16 Myst Val Pky over Water Mystic River | 1906 | 26,600 | Fair |
| ST129 Lowell St over I 93 | 1957 | 26,250 | Poor |
| Hwy Lexington St over RR Mbta/bmrr | 1952 | 26,120 | Fair |
| Hwy Lwll Conn SB over I 495 Ramp B-11 | 1959 | 26,100 | Fair |
| Hwy Aiken St over Water Merrimack River | 1883 | 26,000 | Fair |
| Hwy Myst Val Pky over Water Alewife Brook | 1908 | 26,000 | Fair |
| I 90 Ex 106 I 11A over I 90 | 1968 | 25,892 | Fair |
| US 3 /ST2&16/ALWF over Tr Red Line | 1983 | 25,732 | Poor |
| Hwy Middlesex Rd over Water Bridge Meadow Brk | 1930 | 25,465 | Fair |
| I 90 Ramp G over I 90 Ramps A & B | 1962 | 25,344 | Fair |
| Hwy Marble St over I 93 | 1958 | 25,335 | Fair |
| Hwy SB Lowll Con over Hwy Lincoln St | 1960 | 25,100 | Fair |
| Hwy Wales St over Water Charles River | 1928 | 25,086 | Fair |
| Hwy Salem St over RR Mbta/bmrr | 2021 | 25,000 | Good |
| ST129 Billerica Rd over US 3 | 2004 | 25,000 | Fair |
| Hwy SB Lowll Con over Hwy Plain St | 2012 | 24,827 | Good |
| Hwy Trapelo Rd over I 95 /ST128 | 1960 | 24,727 | Poor |
| Hwy Walnut St over Tr Green Line D | 1906 | 24,569 | Poor |
| I 90 Ramp G over I 90 & Ramp K | 1962 | 24,569 | Fair |
| St 60 Medford St over Water Mystic River | 1936 | 24,310 | Fair |
| Hwy Beacon St over Tr Green Line D | 1917 | 24,000 | Fair |
| Hwy Indstrial Av over Water River Meadow Brook | 1959 | 24,000 | Fair |
| St 99 Nb/broadway over St 16 Rev Bch Pkwy | 1956 | 24,000 | Fair |
| Hwy Wood St Ext over Comb Bmrr & Merrimack R | 1983 | 23,900 | Fair |
| I 90 Ex 117 In 13 over Other Cochituate Trail | 1957 | 23,755 | Fair |
| ST125 Ballrdvle St over I 93 | 1958 | 23,700 | Fair |
| ST129 Richmond Rd over Water Middlesex Canal | 1974 | 23,700 | Fair |
| Hwy Concord Rd over US 3 | 2004 | 23,405 | Fair |
| St 2 A/marrett Rd over I 95 /ST128 | 1961 | 23,310 | Poor |
| Hwy SB Lowll Con over RR CSX (abandoned) | 1960 | 23,224 | Fair |
| St 27 N Main St over RR Mbta/csx | 1895 | 23,000 | Good |
| I 495 Nb/st 2 Cd over St 2 | 2015 | 22,628 | Good |
| US 3 NB over I 95 /ST128 & Cd | 1962 | 22,600 | Poor |
| US 20 Eb/weston St over I 95 /ST128 | 1960 | 22,500 | Poor |
| US 20 EB over RR Mbta/bmrr | 1950 | 22,400 | Fair |
| US 20 Main St over RR Bmrr (abandoned) | 1954 | 22,400 | Fair |
| St 2 A/mass Ave over RR Mbta/bmrr | 1899 | 22,200 | Fair |
| Hwy East St over Water Strong Water Brook | 2008 | 22,050 | Fair |
| Hwy Park Rd over I 90 Ramps J & L | 1957 | 21,724 | Fair |
| St 30 Comm Rd over I 90 | 1957 | 21,700 | Fair |
| Hwy Farwell St over Water Charles River | 1850 | 21,600 | Poor |
| Hwy Speen St NB over St 9 Worcester St | 1977 | 21,600 | Poor |
| Hwy Bridge St over Water Charles River | 1967 | 21,500 | Fair |
| St 38 Main St over Water Shawsheen River | 1997 | 21,500 | Good |
| I 93 ST38 SB Rmp over Hwy Connector Ramp D&k | 1973 | 21,400 | Fair |
| St 16 Ramp over RR Mbta/bmrr | 1954 | 21,300 | Fair |
| St 3 A/prncetn St over Comb Bmrr & Stony Brook | 1956 | 21,207 | Fair |
| Hwy NB Lowll Con over Hwy Plain St | 2012 | 21,008 | Good |
| US 20 WB over RR Mbta/bmrr | 1960 | 20,900 | Fair |
| Hwy School St over Water Merrimack River | 1917 | 20,800 | Fair |
| St 16 Washngton St over Water Charles River | 1929 | 20,800 | Fair |
| Hwy NB Lowll Con over RR CSX (abandoned) | 1960 | 20,716 | Fair |
| Hwy Pawtucket St over RR Bmrr | 1976 | 20,560 | Fair |
| St 2 A/mass Ave over St 3 Memorial Dr | 1931 | 20,560 | Good |
| Hwy River St over Water Beaver Brook | 1984 | 20,528 | Fair |
| St 2 A/e Main St over RR Mbta / Bmrr | 1949 | 20,477 | Fair |
| Hwy Park Ave over St 2 | 1967 | 20,450 | Poor |
| Hwy Parker St over St 9 Boylston St | 1932 | 20,302 | Fair |
| US 3 SB over I 95 /ST128 & Cd | 1962 | 20,200 | Fair |
| Hwy Winthrop St over RR Mbta/bmrr | 1984 | 20,172 | Fair |
| I 90 WB Ramp Off over RR Csx/mbta | 1964 | 19,914 | Fair |
| Hwy Walnut St over Comb I 90 & Csx/mbta | 1964 | 19,784 | Poor |
| St 62 Burlngtn Ave over RR Mbta/bmrr | 2000 | 19,530 | Fair |
| ST117 Fitchbrg Tpk over Water Sudbury River | 2009 | 19,400 | Good |
| St 3 A/boston Rd over Water Shawsheen River | 1915 | 19,400 | Fair |
| I 93 NB Offramp over St 38 Nb/mystic Ave | 1973 | 19,267 | Poor |
| I 90 WB Ramp on over RR Csx/mbta | 1964 | 19,009 | Fair |
| St 28 Mcgrath over Hwy Washington St | 1951 | 18,860 | Fair |
| Hwy Pawtucket St over Water Pawtucket Canal | 2021 | 18,800 | Good |
| St 3 Nb/memorl Dr over Water Charles River | 1956 | 18,750 | Poor |
| Hwy Speen St over Water Fiske Pond | 2011 | 18,600 | Good |
| ST117 Main St over I 95 /ST128 | 1962 | 18,600 | Poor |
| Hwy 85 Connector over Hwy Pleasant St | 1978 | 18,574 | Fair |
| Hwy Lwll Conn NB over Hwy Riverneck Rd | 1959 | 18,549 | Fair |
| US 3 Memorial Dr over Hwy Brookline St | 1940 | 18,503 | Poor |
| Hwy Park Ave over Comb Minutmn Bp & Brook | 1900 | 18,500 | Fair |
| Hwy School St over Comb Kyan St & Bmrr | 1995 | 18,491 | Good |
| St 16 Galen St over Water Charles River | 1907 | 18,491 | Fair |
| St 16 Wb/wshgtn St over Comb I 90 & Csx/mbta | 1964 | 18,491 | Poor |
| St 28 Mcgrath Hwy over Comb Som Ave Ext & Mbta | 1958 | 18,436 | Poor |
| St 3 A/boston Rd over Water Concord River | 1920 | 18,283 | Fair |
| Hwy Bridge St over Water Eastern Canal | 1937 | 18,230 | Poor |
| Hwy Bridge St over Water Merrimack River | 1937 | 18,230 | Fair |
| Hwy Bacon St over Water Aberjona River | 1920 | 18,200 | Fair |
| St 28 Sb/mcgrath over Hwy Medford St | 1951 | 18,135 | Fair |
| Hwy Landham Rd over Water Hop Brook | 2013 | 18,100 | Good |
| Hwy Fr Moris Blv over Water Western Canal | 1967 | 18,000 | Fair |
| Hwy Hartwell Ave over Water Kiln Brook | 1959 | 18,000 | Fair |
| Hwy Mddlsex Tpk over Water Shawsheen River | 2023 | 18,000 | Good |
| Hwy Merrimack St over Water Merrimack Canal | 1823 | 18,000 | Fair |
| Hwy Merrimack St over Water Western Canal | 1831 | 17,900 | Fair |
| Hwy School St over Hwy Parking Lot | 1995 | 17,845 | Fair |
| St 16 Eb/wshgtn St over Comb I 90 & Csx/mbta | 1964 | 17,600 | Fair |
| Hwy NB Lowll Con over Hwy Lincoln St | 1960 | 17,510 | Fair |
| ST129 Billerica Rd over Water River Meadow Brook | 2022 | 17,500 | Good |
| Hwy School St over Water Pawtucket Canal | 1995 | 17,457 | Fair |
| Hwy Central St over Water Sudbury River | 1969 | 17,300 | Fair |
| St 62 Main St over Water Assabet River | 1978 | 17,300 | Fair |
| Hwy NB Lowll Con over I 495 | 1959 | 17,180 | Poor |
| ST113 Pleasant St over Water Beaver Bk East Str | 1855 | 17,123 | Fair |
| ST113 Pleasant St over Water Beaver Bk West Str | 1855 | 17,123 | Fair |
| St 62 /ST2A/MAIN over Water Sudbury River | 1909 | 17,100 | Fair |
| St 62 Burlingtn Rd over Water Shawsheen River | 1962 | 17,100 | Fair |
| Hwy Kearney Sq over Water Eastern Canal | 1835 | 16,900 | Fair |
| Hwy River Rd over I 95 /ST128 | 1960 | 16,800 | Fair |
| Hwy Rsvelt Rot N over I 93 | 1961 | 16,800 | Fair |
| Hwy Newton St over Water Charles River | 1877 | 16,601 | Fair |
| Hwy South St over Water Stony Brook | 2003 | 16,293 | Fair |
| I 93 Rp to I93 NB over I 93 | 1972 | 16,231 | Fair |
| I 95 /ST128 over St 28 Main St | 1950 | 16,090 | Fair |
| Hwy Salem End Rd over Water Stearns Reservoir | 1870 | 15,625 | Fair |
| Hwy Rogers St over Water Concord River | 1884 | 15,600 | Fair |
| ST113 /ST3A/KENDLL over Water Merrimack River | 1930 | 15,470 | Fair |
| I 93 Ramp Ts over US 1 Ramp Lc | 2002 | 15,468 | Fair |
| Hwy Salem St over I 93 | 1957 | 15,400 | Fair |
| Hwy First St over Water Broad Canal | 1924 | 15,388 | Poor |
| Hwy Fellsway Wst over I 93 | 1962 | 15,200 | Fair |
| Hwy Speen St NB over Hwy Ramps D & G | 1977 | 15,000 | Fair |
| Hwy Prospect St over RR Mbta/bmrr | 1933 | 14,900 | Fair |
| Hwy Trapelo Rd over RR Mbta/bmrr | 1952 | 14,900 | Fair |
| Hwy Medford St over RR Mbta/bmrr | 1910 | 14,800 | Fair |
| Hwy Moody St over Water Charles River | 1917 | 14,800 | Fair |
| Hwy Mt Wayte Ave over Water Eames Brook | 1947 | 14,700 | Good |
| US 20 Bostn Pst Rd over Water Sudbury River | 2009 | 14,603 | Good |
| US 20 Bstn Post Rd over Water Hop Brook | 1947 | 14,603 | Fair |
| Hwy Lyman St over Water Lyman Pond Creek | 1999 | 14,500 | Fair |
| Hwy Main St over Water Wedge Pond Otlt | 1935 | 14,483 | Fair |
| Hwy Concord St over Water Sudbury River | 1992 | 14,425 | Fair |
| St 4 NB over US 3 Nb/sb | 2004 | 14,416 | Good |
| Hwy Grove St over I 95 /ST128 | 1961 | 14,400 | Fair |
| St 62 Main St over Water Assabet River | 1886 | 14,400 | Fair |
| St 62 Main St over Water Power Canal | 1885 | 14,400 | Fair |
| Hwy Winter St over RR Mbta/csx | 2017 | 14,300 | Good |
| Hwy Winter St over Water Sudbury River | 1877 | 14,300 | Fair |
| Hwy Winter St over Water Sudbury River | 1870 | 14,300 | Fair |
| Hwy E Merrimack over Water Concord River | 1896 | 14,250 | Fair |
| ST119 Great Rd over I 495 | 1960 | 14,233 | Fair |
| Hwy Lowell Ave over Comb I 90 & Csx/mbta | 1964 | 14,224 | Poor |
| Hwy Wilder St over RR Bmrr Pan Am | 1850 | 14,200 | Fair |
| Hwy Union Ave over Water Sudbury River | 1985 | 14,143 | Good |
| Hwy College Ave over RR Mbta/bmrr | 1997 | 14,100 | Fair |
| St 4 SB over US 3 Nb/sb | 2004 | 14,018 | Fair |
| St 3 A/gorham St over Water River Meadow Brook | 1960 | 14,012 | Poor |
| Hwy Beacon St over RR Mbta/bmrr | 1899 | 14,000 | Fair |
| Hwy Boylston St over RR Bmrr | 1999 | 14,000 | Good |
| ST119 Great Rd over RR Bmrr | 1995 | 13,913 | Fair |
| ST119 Great Rd over Water Beaver Brook | 1921 | 13,913 | Fair |
| Hwy Rsvelt Rot S over I 93 | 1961 | 13,900 | Fair |
| ST119 South Rd over Water Nashua River | 1931 | 13,807 | Fair |
| ST119 South St over Water Nashua River Trib | 1910 | 13,807 | Fair |
| Hwy Mishawum Rd over I 95 /ST128 | 1961 | 13,700 | Poor |
| Hwy Centre St over Tr Green Line D | 1907 | 13,600 | Fair |
| St 4 Nashua Rd over Water Concord River | 2008 | 13,600 | Good |
| Hwy Univrsty Ave over Water Merrimack & Canal | 2014 | 13,500 | Good |
| Hwy Winthrop St over Water Mystic River | 1926 | 13,500 | Poor |
| I 93 NB on Ramp over Comb Mystic Av & Pedest | 1973 | 13,464 | Fair |
| ST113 Kendall Rd over US 3 | 2004 | 13,448 | Fair |
| Hwy Lawrence St over Water Concord River | 1850 | 13,300 | Fair |
| I 93 SB Off Ramp over I 93 Connectors | 1973 | 13,300 | Fair |
| Hwy Washngton St over RR Mbta/bmrr | 1982 | 13,200 | Fair |
| St 38 NB Smith Rty over Hwy Lowell-lwrnce Blvd | 1954 | 13,060 | Fair |
| Hwy Broad St over Water Assabet River | 2005 | 13,000 | Good |
| Hwy Faulkner St over Water Concord River | 1850 | 13,000 | Fair |
| Hwy Landham Rd over RR Bmrr (abandoned) | 1970 | 13,000 | Fair |
| Hwy Speen St over RR Mbta/csx | 1900 | 13,000 | Poor |
| Hwy Sudbury Rd over Water Sudbury River | 1967 | 13,000 | Fair |
| ST110 Church over Water Concord River | 1858 | 13,000 | Fair |
| Hwy Haverhill St over Water Ipswich River | 1958 | 12,900 | Fair |
| Hwy River St over Water Concord River | 2003 | 12,900 | Fair |
| Hwy Plain St over Water River Meadow Brook | 1960 | 12,850 | Fair |
| Hwy St James St over Comb I 90 & Csx/mbta | 1964 | 12,802 | Fair |
| St 2 A/ST110/AYER over RR Mbta/bmrr | 1975 | 12,797 | Fair |
| ST111 Mass Ave over Water Fort Pond Brook | 1907 | 12,700 | Fair |
| Hwy Land Blvd over Water Broad Canal | 1956 | 12,579 | Poor |
| Hwy Memorl Dr EB over Water Charles River | 1956 | 12,579 | Fair |
| St 27 /ST62/WALTHM over Water Assabet River | 2013 | 12,574 | Good |
| St 27 Old Sudbury over Water Sudbury River | 1956 | 12,500 | Fair |
| St 38 Main St over RR Mbta/bmrr | 1928 | 12,500 | Poor |
| ST113 Main St over Water Nashua River | 1937 | 12,478 | Poor |
| ST119 /ST2 A over Water Nashoba Brook | 1940 | 12,463 | Poor |
| Hwy Spring St over St 2 | 1967 | 12,434 | Fair |
| Hwy Treble Cove over US 3 | 2004 | 12,400 | Fair |
| ST117 Great Rd over Water Elizabeth Brook | 1952 | 12,373 | Fair |
| St 62 Washngton St over Water Ipswich River | 1947 | 12,300 | Fair |
| Hwy Vfw Hwy over Water Beaver Brook | 2022 | 12,262 | Good |
| Hwy Lwll Conn SB over Hwy Riverneck Rd | 1959 | 12,203 | Fair |
| Hwy Central St over Water Lwr Pawtucket Cnl | 1835 | 12,184 | Good |
| Hwy Lowell Rd over Water Concord River | 1964 | 12,000 | Fair |
| St 2 A/maple St over Other Minuteman Bike Pth | 1919 | 12,000 | Fair |
| Hwy Aiken St over Water Northern Canal | 1897 | 11,800 | Fair |
| Hwy Skillings Rd over Water Aberjona River | 1955 | 11,800 | Fair |
| ST135 Union St over Water Sudbury River | 2012 | 11,728 | Good |
| Hwy Florence St over Hwy Dartmouth St | 1975 | 11,600 | Fair |
| Hwy Watertown St over St 2 | 1967 | 11,600 | Poor |
| ST119 Main St over Water Squannacook River | 1950 | 11,596 | Fair |
| ST135 Union St over Water Sudbury River | 1900 | 11,481 | Fair |
| Hwy Crossng Blvd over Comb St 9 & CSX | 1989 | 11,379 | Fair |
| St 62 Main St over Water Assabet River | 1958 | 11,300 | Fair |
| ST117 Great Rd over Water Assabet River | 1900 | 11,163 | Fair |
| ST117 Great Rd over Water Mill Canal | 1850 | 11,163 | Fair |
| St 62 Main St over Water Assabet River | 1922 | 11,163 | Poor |
| Hwy Plsnt St Con over Comb St 9 WB & CSX | 1994 | 11,137 | Fair |
| St 30 Pleasant St over I 90 | 1957 | 11,137 | Fair |
| St 30 Pleasant St over Water Stoney Brook | 1895 | 11,137 | Good |
| Hwy SB Lowll Con over I 495 | 1959 | 11,013 | Poor |
| Hwy Old Conn Pth over I 90 | 1957 | 11,000 | Fair |
| Hwy Lawrence St over Water River Meadow Brook | 1910 | 10,969 | Fair |
| Hwy Dane St over RR Mbta/bmrr | 1913 | 10,900 | Fair |