| I 93 /US1/ST3 over Comb Mbta & Red Ln Ssh | 1957 | 211,123 | Fair |
| I 93 /US1/ST3 over Hwy Conley St | 1955 | 193,593 | Fair |
| I 93 /US1/ST3 over Hwy Victory Rd | 1955 | 193,593 | Fair |
| I 93 /US1/ST3 over Comb Mbta & Columbia Rd | 1958 | 193,500 | Fair |
| I 93 /US1/ST3 over Hwy Hallet Street | 1956 | 190,508 | Fair |
| I 93 /US1/ST3 over Hwy Morrissey Blvd | 1958 | 188,320 | Fair |
| I 93 /US1/ST3 over RR CSX Spur | 1958 | 188,320 | Fair |
| I 93 /US1/ST3 over Hwy Theatre Access Rd | 1957 | 177,033 | Fair |
| I 93 /US1/ST3 over Hwy Nep Av/galv/mrsy | 1955 | 173,365 | Fair |
| I 93 /US1/ST3 over Other Ped/ Bike Path | 1956 | 171,195 | Fair |
| I 93 /US1/ST3 over Water Neponset River | 1954 | 169,936 | Fair |
| I 93 SB over Hwy Albany St | 1997 | 164,570 | Fair |
| I 93 SB over Hwy W Fourth St | 2000 | 164,570 | Fair |
| I 93 & Rmp Sa-cn over Water Charles Riv/ramps | 2002 | 155,200 | Fair |
| I 93 SB over Hwy Traveler St & Park | 2000 | 148,110 | Fair |
| I 93 SB over Other Parking Area | 2000 | 148,110 | Fair |
| US 1 NE Xway over Hwy Orange & Carter St | 1956 | 137,500 | Good |
| I 90 over Water Muddy River | 1965 | 128,567 | Fair |
| I 93 NB over Hwy Broadway | 2002 | 127,241 | Fair |
| I 93 NB over Hwy Frontage Rd NB | 2002 | 127,241 | Fair |
| I 90 over Hwy Service Rd | 1965 | 124,855 | Fair |
| I 90 over Other Relief | 1964 | 124,855 | Fair |
| St 1 A/lee Brbnk over Other Oil Pipe Tunnel | 1934 | 119,439 | Fair |
| St 1 A/lee Brbnk over Other Oil Pipe Tunnel | 1933 | 119,439 | Fair |
| I 93 SB over Comb I90 & Amtrak | 2000 | 116,881 | Fair |
| I 93 NB over Comb I90 Rps&hov&amtk | 2002 | 116,800 | Fair |
| I 93 SB over Other Relief | 2000 | 108,879 | Fair |
| St 1 A over Hwy M Coughlin & Relie | 1951 | 102,900 | Fair |
| I 93 SB over Comb Ramp Lt& Millers R | 2002 | 97,000 | Fair |
| US 1 NE Xway over Hwy Webster Ave | 1956 | 91,000 | Fair |
| US 1 Cutler Hwy over Water Town Line Brook | 1957 | 89,000 | Fair |
| St 1 A over Hwy Saratga St & U Trn | 1951 | 86,897 | Fair |
| I 93 SB Bt 33-38 over Tr Orange Line | 1970 | 85,975 | Fair |
| I 93 SB Bt 38-46 over Tr Orange Line | 1970 | 85,975 | Fair |
| I 93 SB Bt 46-57 over Tr Orange Line | 1970 | 85,975 | Fair |
| I 93 SB Bt 57-61 over RR Mbta & Bmrr | 1970 | 85,975 | Fair |
| I 93 SB Bt 61-b5 over RR Bmrr | 1970 | 85,975 | Fair |
| US 1 NE Xway over RR Mbta & Silver Line | 1957 | 83,976 | Fair |
| US 1 over Hwy Spruce St | 1957 | 83,976 | Good |
| US 1 NE Xway over Hwy Sargent St | 1956 | 83,793 | Fair |
| US 1 NE Xway over St 60 Eb/squire Rd | 1958 | 83,500 | Fair |
| US 1 NE Xway over US 1 Ramp & ST60 | 1956 | 83,100 | Fair |
| Hwy Columbia Rd over Comb Old Colny&mbta&red | 1956 | 82,500 | Fair |
| I 93 NB over Hwy W Fourth St | 2002 | 82,300 | Fair |
| I 93 NB Bt 38-46 over I 93 SB Bt 38-46 | 1970 | 81,000 | Fair |
| I 93 SB over Comb Millers River/ Oth | 2002 | 80,170 | Fair |
| I 93 NB over Other Relief | 2002 | 80,156 | Good |
| I 93 NB over I 93 Sb/rmp Lt/mil Rv | 2002 | 79,712 | Fair |
| Hwy Morrssey Blv over Water Dorchester Bay | 1927 | 78,900 | Poor |
| US 1 NE Xway over Hwy Malden St | 1958 | 78,758 | Fair |
| I 93 NB over Other Relief | 2002 | 77,653 | Fair |
| I 93 NB over Other Relief | 2002 | 77,653 | Fair |
| I 93 Bt Sb4-n Abt over Hwy Connectors D & K | 1970 | 77,596 | Poor |
| I 93 SB B16-sb4 over Comb Cambrige&mbta/bmrr | 1970 | 77,596 | Fair |
| US 1 NE Xway over St 16 Revere Bch Pkwy | 1955 | 77,513 | Fair |
| St 3 A/morrsy Blv over Comb Neponset Ave&river | 1970 | 76,500 | Fair |
| I 90 EB over RR Mbta | 1965 | 76,373 | Poor |
| I 93 NB B16-nb4 over I 93 Sb&cmbrg&mbta/bmrr | 1970 | 76,000 | Fair |
| I 93 NB Bt 33-38 over I 93 SB Bt 33-38 | 1970 | 75,910 | Fair |
| I 93 NB over I 93 SB Bt 46 - 57 | 1970 | 75,910 | Fair |
| I 93 NB over I 93 SB Bt 57 - 61 | 1970 | 75,910 | Fair |
| I 93 NB over I 93 SB Bt 61 - B5 | 1970 | 75,910 | Fair |
| I 90 WB over RR Mbta | 1965 | 74,344 | Poor |
| I 93 Strrw Dr Con over Water Charles River | 1999 | 74,323 | Fair |
| I 93 NB over I 93 SB | 2003 | 70,395 | Fair |
| Hwy Mass Ave over Other Relief | 2000 | 69,827 | Fair |
| I 93 NB B5-b10 over Comb Mbta & I 93 SB | 1970 | 69,748 | Fair |
| Hwy Ramp T-d over Hwy Ramp S-a | 2001 | 69,000 | Fair |
| Hwy Ramp T-d over Hwy Ramp T/u-a/s-a | 2001 | 69,000 | Fair |
| I 90 EB over Hwy Brooks St | 1964 | 68,426 | Fair |
| I 90 EB over Hwy Parsons St | 1964 | 68,246 | Fair |
| St 28 Blue Hill Av over Water Neponset River | 1903 | 66,466 | Fair |
| US 1 NE Xway over Hwy Hysil Ave | 1956 | 66,200 | Fair |
| I 90 WB over Hwy Brooks St | 1964 | 66,035 | Fair |
| I 90 WB over Hwy Parsons St | 1964 | 66,035 | Fair |
| I 93 Bt Nb4-n Abt over I 93 Conn D & K | 1970 | 65,702 | Fair |
| St 28 Leverett Cir over Hwy Embankment Rd WB | 1952 | 61,034 | Good |
| St 1 A/lee Brbnk over Other Oil Pipe Tunnel | 1933 | 60,846 | Fair |
| I 93 Ramps Sn NS over RR Mbta | 1999 | 60,517 | Fair |
| US 1 Ramp Tc over Other Relief | 2002 | 60,300 | Good |
| US 1 Ramp Tc over Other Relief | 2002 | 60,300 | Good |
| I 90 WB & RP1ASB over Other Relief | 1999 | 60,129 | Good |
| I 93 NB B10-b16 over I 93 SB B10-b16 | 1970 | 58,882 | Fair |
| Hwy Storrw Dr WB over Hwy Storrow Dr EB | 1951 | 57,770 | Poor |
| I 93 SB B10-b16 over RR Mbta/bmrr | 1970 | 57,435 | Fair |
| I 93 SB B5-b10 over RR Mbta/bmrr | 1970 | 57,435 | Fair |
| I 93 Ramp Sn over US 1 Ramp Tc | 1999 | 56,897 | Good |
| St 1 A over Hwy Chelsea & Bremen S | 1951 | 56,669 | Fair |
| I 93 SB over Comb Austin St &orng Ln | 2003 | 55,751 | Fair |
| St 1 A/lee Brbnk over ST145 Revere Bch Pkwy | 1934 | 55,630 | Poor |
| Hwy Bowker Int over Comb I 90 & Mbta | 1965 | 55,075 | Poor |
| Hwy Morrssey Blv over Water Pattens Cove | 1973 | 54,957 | Fair |
| St 1 A/lee Brbnk over Comb ST16 & Mbta/bmrr | 1934 | 54,957 | Fair |
| I 90 WB over US 20 N Beacon St | 1964 | 54,100 | Fair |
| Hwy Bowker Int over St 2 Comm Av Beacon St | 1965 | 53,577 | Fair |
| Hwy Quincy Shore over St 3 A/hnck Nb&mbta&red | 1970 | 52,597 | Fair |
| I 90 EB over US 20 N Beacon St | 1964 | 52,193 | Fair |
| Hwy Boylston St over Water Muddy River | 1881 | 51,600 | Fair |
| ST145 Rev Bch Pkwy over RR Mbta/bmrr | 1899 | 51,500 | Good |
| US 1 Ramp Tc over Comb I93 Rmp NS & Mbta | 2002 | 51,207 | Fair |
| US 1 Ramp Tc over RR Mbta | 2002 | 51,207 | Fair |
| I 90 WB over St 1 A/nb & RP1ANB | 1999 | 50,431 | Good |
| Hwy Frnt Rd NB over Other Relief | 2000 | 49,913 | Fair |
| Hwy Jamaicaway over Other Peat Bog | 1937 | 48,750 | Fair |
| US 1 SB Bts 36/PR over Hwy Arlington & 5TH St | 1957 | 48,700 | Fair |
| St 1 A/vfw Pkwy over RR Mbta/bmrr | 1932 | 47,457 | Fair |
| I 93 NB Ramp S-n over Hwy Nashua St | 2005 | 47,100 | Fair |
| US 1 Ramp Ct over Other Relief | 2001 | 46,604 | Fair |
| Hwy Eliot Bridge over Water Charles River | 1950 | 46,415 | Fair |
| I 93 SB over Other Relief | 1997 | 45,270 | Fair |
| Hwy Ramp K over Other Relief | 2002 | 45,000 | Good |
| Hwy Ramp K over Other Relief | 2002 | 45,000 | Good |
| Hwy Ramp K/l over Other Relief | 2002 | 44,224 | Good |
| St 1 A/sb over Other Relief | 1951 | 43,178 | Fair |
| St 1 A/sb over Other Relief | 1951 | 43,178 | Fair |
| St 1 A/sb over Other Relief & Ped Walkw | 1951 | 43,178 | Fair |
| Hwy Mass Av Conn over Other Relief | 2000 | 42,900 | Fair |
| Hwy Milton St over RR Amtrak/mbta | 1919 | 42,700 | Fair |
| Hwy Frnt Rd NB over Other Relief | 2000 | 42,672 | Fair |
| I 93 Ramp S-n over RR Mbta | 1999 | 42,672 | Good |
| US 1 Ramp Tc over Comb US1NB & Millers Ri | 1989 | 42,672 | Good |
| US 1 Ramp Ct over Other Relief | 2001 | 42,552 | Good |
| US 1 NB/ Lo Deck over Hwy Chrltwn Local Sts | 1950 | 42,492 | Fair |
| US 1 Nb/l Mystc L over Hwy Chelsea Street | 1950 | 42,492 | Fair |
| US 1 Nb/low Deck over Hwy Chelsea Local Stre | 1950 | 42,492 | Poor |
| US 1 Nb/lowr Deck over Water Mystic River | 1950 | 42,492 | Fair |
| Hwy Frnt Rd NB over Other Relief | 2000 | 42,155 | Fair |
| US 1 Nb/lowr Deck over Other Relief | 1950 | 41,988 | Fair |
| US 1 Nb/s Abt PR1 over Hwy Arlington & 5TH St | 1957 | 41,988 | Good |
| US 1 Ramp Ct over Comb Mbta & Millers Riv | 2001 | 41,800 | Fair |
| US 1 Sb/b Mystc U over US 1 Nb/big Mystic Lowr | 1950 | 41,655 | Fair |
| US 1 Sb/l Mystc U over US 1 Nb/lit Mystic Lowr | 1950 | 41,655 | Fair |
| US 1 Sb/uppr Deck over US 1 Nb/chel Lwr Deck | 1950 | 41,655 | Poor |
| Hwy Morrssey Blv over Hwy Mt Vernon St | 1925 | 41,500 | Good |
| Hwy Blue Hill Av over RR Mbta | 1902 | 41,250 | Poor |
| Hwy Morton St over RR Mbta | 2015 | 40,862 | Good |
| US 1 Sb/bs U11-32 over US 1 Nb/bos Lowr B11-32 | 1950 | 40,790 | Fair |
| US 20 Comm Av/mbta over Comb I 90 & Mbta/csx | 1965 | 40,783 | Good |
| ST109 Spring St over Water Charles River | 1861 | 40,200 | Fair |
| Hwy Mass Ave over I 93 | 2000 | 40,100 | Fair |
| St 99 Alford St over Water Mystic River | 1963 | 40,000 | Fair |
| Hwy Austin St over Comb I 93 Rmp&mbta&orng | 1974 | 39,400 | Fair |
| Hwy Granite Ave over Water Neponset River | 1959 | 39,339 | Fair |
| I 93 Ramps Sn NS over RR Mbta Bsg Spur | 1999 | 38,735 | Good |
| St 2 A/mass Ave over Comb Strw Dr & Chas Riv | 1891 | 38,638 | Fair |
| Hwy Frnt Rd NB over Hwy Ramp K | 2000 | 38,534 | Fair |
| Hwy Frontage Rd over Other Relief | 1998 | 38,534 | Fair |
| I 93 Ramp Sn over US 1 Ramp Tc & Lc | 1999 | 38,009 | Good |
| Hwy Jamaicaway over St 9 Huntngton Ave | 1936 | 37,500 | Fair |
| St 2 Brookline St over Comb Sol Fld Rd & Riv | 1928 | 37,370 | Fair |
| I 93 Ramps Sn NS over RR Bmrr Bsg Spur | 1999 | 37,301 | Fair |
| I 93 Ramps Sn NS over RR Bmrr Bsg Spur | 1999 | 37,301 | Fair |
| US 1 Sb/toll Uppr over US 1 Nb/toll Plaza Lowr | 1950 | 37,289 | Fair |
| St 16 Rev Bch Pkwy over ST107 Broadway | 1931 | 36,500 | Poor |
| I 93 NB over I 93 Sb/austn St/mbta | 2002 | 36,462 | Good |
| Hwy N Wshngtn St over Hwy Water St | 1900 | 36,206 | Fair |
| Hwy N Wshngtn St over Other Warehouse | 1900 | 36,206 | Good |
| Hwy Frnt Rd SB over Other Relief | 1997 | 36,200 | Fair |
| I 93 Ramp N-s over Comb Mgh Pkng & Mbta | 1999 | 35,899 | Good |
| I 93 Ramp N-s over Comb Nashua St&mgh Pkng | 1999 | 35,899 | Good |
| I 93 Ramp N-s over I 93 Ramp Lc-s Tunnel | 1999 | 35,899 | Good |
| I 93 Ramp N-s over Other Relief | 1999 | 35,899 | Fair |
| US 1 Ramp Tc over I 93 Rmps Sn NS St | 2002 | 35,800 | Fair |
| ST107 Salem Tpk over Water Pines River | 2011 | 35,302 | Fair |
| I 93 Ramp Sn over Other Relief | 1999 | 34,914 | Fair |
| I 93 Ramp Sn over US 1 Ramp Ct | 1999 | 34,914 | Good |
| Hwy Dorchstr Ave over Comb Haul Rd & Mbta Red | 1917 | 34,913 | Fair |
| Hwy Saratoga St over Tr Blue Line | 1913 | 34,400 | Fair |
| St 1 A/n Shore Rd over St 1 A/ramp A&b | 1972 | 34,214 | Fair |
| ST145 Saratoga St over Water Belle Isle Inlet | 2013 | 34,138 | Good |
| US 1 SB over US 1 NB | 1994 | 34,040 | Poor |
| Hwy Arsenal St over Water Charles River | 1925 | 34,009 | Fair |
| Hwy Sohamptn St over Comb Amtrak & Red Line | 1902 | 33,800 | Fair |
| St 1 A over Hwy Bningtn & Neptune | 1951 | 33,770 | Fair |
| Hwy Cambridge St over Water Charles River | 1925 | 33,400 | Poor |
| ST107 Broadway over Water Diamond Creek | 2011 | 33,103 | Fair |
| Hwy Adams St over Water Neponset River | 1765 | 32,845 | Fair |
| Hwy Southmptn St over I 93 /US1/ST3 | 1958 | 32,327 | Fair |
| Hwy Storrw Dr EB over Hwy Bowkr on & Off Rps | 1954 | 32,000 | Poor |
| I 93 Ramp NS over Other Relief | 1999 | 31,810 | Fair |
| Hwy Cambridge St over Comb I 90 & Mbta/csx | 1964 | 31,600 | Poor |
| Hwy Mystic Ave over Comb Orange & Mbta/bmrr | 1953 | 31,293 | Fair |
| I 93 Ramp NS over RR Mbta | 1999 | 31,000 | Fair |
| Hwy Cambridge St over Hwy Soldiers Field Rd | 1954 | 30,800 | Fair |
| I 90 Ramp B & D over Hwy Service Road | 1981 | 30,517 | Fair |
| Hwy Trmnt-arlngt over RR Amtrak/mbta | 1979 | 30,400 | Poor |
| ST145 Rev Bch Pkwy over Comb Blue Ln & State Rd | 1933 | 30,300 | Good |
| Hwy Western Ave over Hwy Soldiers Field Rd | 1968 | 30,000 | Fair |
| I 93 Ramp Sa-cn over Hwy Access Rd | 2003 | 29,700 | Good |
| St 1 A NB over Other Relief | 1951 | 29,117 | Fair |
| St 1 A/nb over Other Relief | 1951 | 29,117 | Fair |
| St 3 Cambridge St over Comb St3/st28 & Charles | 1905 | 29,100 | Fair |
| St 16 EB over Hwy Access Ramp E | 1955 | 29,000 | Fair |
| Hwy Summer St over Water Fort Point Channel | 1899 | 28,319 | Fair |
| Hwy Comm Ave EB over Water Muddy River | 1917 | 28,190 | Fair |
| St 28 Chas R Dm Rd over Water Charles River | 1906 | 28,188 | Poor |
| Hwy Benningtn St over Hwy Martin Coughlin By | 1906 | 28,100 | Fair |
| Hwy Market St over Comb I 90 & Mbta/csx | 1964 | 28,100 | Fair |
| St 28 Chas R Dm Rd over Water Charles River | 1910 | 27,554 | Fair |
| Hwy Cambridge St over Comb I90 E Rps Bdl & Cs | 1965 | 27,500 | Poor |
| Hwy Ramp K over Other Relief | 2002 | 27,414 | Good |
| Hwy W Roxbry Pky over RR Mbta | 1921 | 27,414 | Poor |
| Hwy Dartmouth St over RR Amtrak/mbta | 1983 | 27,310 | Good |
| Hwy Amer Leg Hwy over ST203 Morton St | 2012 | 27,200 | Good |
| Hwy West St over RR Amtrak/mbta | 1986 | 27,155 | Fair |
| US 1 Ramp Ct over Other Relief | 2001 | 27,143 | Good |
| Hwy South Rotary over St 99 Sullivan Sq Undrps | 1951 | 27,025 | Fair |
| Hwy Beacon St over Comb I 90 & Mbta/csx | 1965 | 26,911 | Poor |
| Hwy Broadway over Comb Mbta/st & Ft Pt C | 1996 | 26,900 | Fair |
| US 1 Ramp Ct over Comb I93 SB &rmps& Mbta | 2001 | 26,663 | Fair |
| Hwy Western Ave over Hwy Soldiers Field Rd | 1954 | 26,638 | Fair |
| US 20 N Beacon St over Water Charles River | 1915 | 26,400 | Fair |
| Hwy Austin St over Hwy Rutherford Ave | 1972 | 26,120 | Fair |
| Hwy Western Ave over Water Charles River | 1924 | 26,100 | Fair |
| I 93 SB B10-b16rp over RR Mbta & Bmrr | 1970 | 26,000 | Fair |
| Hwy Arlington St over Comb I 90 & Amtrak | 1965 | 25,800 | Poor |
| I 93 Ramp As over Other Relief | 2003 | 25,600 | Fair |
| Hwy Herald St over RR CSX Spur | 1957 | 25,300 | Fair |
| ST107 Broadway over Water Mill Creek | 1993 | 25,300 | Fair |
| Hwy W Newton St over Tr Orange Line | 1932 | 24,209 | Good |
| Hwy N Harvard St over Comb Charles Rv | 1912 | 24,100 | Fair |
| Hwy Summer St over Water Reserve Channel | 1892 | 24,052 | Fair |
| Hwy Arlngtn Ofrp over Hwy Embnkt Rd EB Onrmp | 1950 | 24,000 | Fair |
| Hwy River St over RR Amtrak/mbta | 1883 | 24,000 | Poor |
| Hwy D St over Comb Haul Rd & CSX | 2005 | 23,300 | Good |
| Hwy Nepnst V Pky over Water Neponset River | 1849 | 23,300 | Fair |
| Hwy Mass Ave over St 9 Huntington Ave | 1941 | 23,275 | Fair |
| St 9 Huntingtn Av over Other Relief | 1965 | 23,275 | Good |
| Hwy Centre St over RR Mbta | 1888 | 23,147 | Poor |
| Hwy Cambridge St over Comb Orange & Mbta/bmrr | 1880 | 23,000 | Fair |
| Hwy Meridian St over Water Chelsea River | 1954 | 22,435 | Poor |
| I 93 Ramp Cc & Fx over Comb I90& Rp Kk &amtrk | 2003 | 22,400 | Fair |
| Hwy Ramp U-a/d over Hwy Ramp 1a-a/d | 2001 | 22,300 | Fair |
| Hwy Tremont St over Comb Amtrak/mbta & Orng | 1981 | 22,250 | Fair |
| Hwy Ramp L over Hwy Ramp Fl | 2002 | 22,241 | Good |
| I 93 Ramp As over Other Relief | 2003 | 22,241 | Good |
| St 1 A/sb over Other Relief | 1999 | 22,241 | Good |
| St 1 A/sb over Other Relief | 1999 | 22,241 | Good |
| St 2 A/mass Ave over St 2 Commonwealth Ave | 1937 | 22,241 | Good |
| Hwy Seaport Blvd over Water Fort Point Channel | 1996 | 22,000 | Fair |
| Hwy Washngton St over RR Mbta | 1933 | 22,000 | Fair |
| US 1 Ramp Lc over Comb US1SB/NB&MILLERS R | 1989 | 21,724 | Fair |
| Hwy N Harvard St over Hwy Soldiers Field Rd | 1954 | 21,700 | Fair |
| I 93 Ramp Sacn over Comb US1 Rmp Lt Lc&orng | 2005 | 21,600 | Good |
| Hwy Mass Ave over Comb I 90 & Mbta/csx | 1965 | 21,206 | Poor |
| St 3 A/hnck Offrp over Other Relief | 1970 | 21,200 | Fair |
| Hwy Adams St over Tr Red Line Matt Conn | 1886 | 21,000 | Fair |
| I 90 EB Off- Ramp over I 90 WB & Ramps F D L | 1964 | 20,700 | Poor |
| Hwy Meridian St over St 1 A/nb | 1961 | 20,689 | Fair |
| I 93 Ramp NS over US 1 Ramp Tc & Lc | 1999 | 20,547 | Fair |
| I 93 Ramp Sa-cn over I 93 Ramps | 2004 | 20,359 | Fair |
| Hwy Park Dr over Tr Green Line D | 1893 | 20,300 | Fair |
| I 93 Ramps NS Sn over Other Relief | 1999 | 20,161 | Good |
| I 93 Ramps NS Sn over Other Relief | 1999 | 20,161 | Fair |
| Hwy Summer St over Hwy C St | 2000 | 20,043 | Good |
| I 93 Ramp NS over US 1 Ramp Tc | 1999 | 19,945 | Good |
| Hwy Berkeley St over Comb Amtrak/mbta & Orng | 1982 | 19,900 | Fair |
| Hwy Cummins Hwy over RR Amtrak/mbta | 1921 | 19,800 | Fair |
| I 93 Ramp Sacn over Tr Orange Line | 2005 | 19,624 | Fair |
| Hwy Maffa Way over Comb Orange & Mbta/bmrr | 1952 | 19,526 | Fair |
| I 93 Ramp Sn over Tr Mbta Orange Line | 1999 | 19,452 | Good |
| I 90 Ramp D over Other Garage Ramp | 1981 | 19,396 | Good |
| I 90 Ramp D over Other Mbta & Ramp B | 1981 | 19,396 | Fair |
| I 90 Ramp D over Other Relief | 1981 | 19,396 | Good |
| I 93 Ramp NS over RR Mbta | 1999 | 19,352 | Fair |
| I 90 EB Ramp on D over I 90 | 1964 | 19,236 | Fair |
| St 9 Huntingtn Av over Comb I 90 & Mbta/csx | 1965 | 19,200 | Poor |
| Hwy S Bos Bps Rd over Other Relief | 1998 | 19,138 | Fair |
| Hwy S Bos Bps Rd over Other Relief | 1998 | 19,138 | Fair |
| Hwy S Bos Bps Rd over Other Relief | 1998 | 19,138 | Fair |
| Hwy River St over RR Mbta | 2012 | 19,100 | Good |
| Hwy Truman Hwy over Water Neponset River | 1939 | 18,900 | Fair |
| Hwy Bwkr SB Onrp over Water Muddy River | 1965 | 18,470 | Poor |
| Hwy W Broadway over Comb Haul Rd & Mbta Red | 1918 | 18,103 | Fair |
| I 90 WB Ramp Off over RR Mbta | 1965 | 17,948 | Fair |
| I 93 Ramp Lc-n over Hwy Nashua St | 2005 | 17,900 | Good |
| Hwy Dalton St over Comb I 90&CAMBRIA&CSX | 1850 | 17,844 | Poor |
| I 93 NB Ramp C-l over Other Relief | 1999 | 17,800 | Fair |
| I 93 NB Ramp Cl over Other Relief | 1999 | 17,800 | Fair |
| I 93 NB Ramp Cl over Other Relief | 1999 | 17,800 | Fair |
| Hwy Summer St over Hwy A St | 1918 | 17,700 | Fair |
| Hwy Washngtn Ave over Water Pines River | 1950 | 17,700 | Fair |
| Hwy Bnningtn St over Tr Blue Line | 1961 | 17,300 | Fair |
| Hwy Cummins Hwy over RR Mbta | 1901 | 17,300 | Good |
| Hwy Summer St over Comb I90 Rps& Haul &CSX | 2002 | 17,300 | Good |
| Hwy Summer St over Hwy W Service Rd Ext | 2003 | 17,300 | Good |
| Hwy River St over Water Mother Brook | 1976 | 17,198 | Good |
| Hwy Congress St over Water Fort Point Channel | 1850 | 17,100 | Poor |
| Hwy Bwkr NB Ofrp over Hwy Strrw Dr WB on Rmp | 1965 | 16,971 | Fair |
| I 90 EB Ramps Off over RR Mbta/csx | 1965 | 16,878 | Poor |
| Hwy Saratoga St over Hwy Martin Coughlin By | 1906 | 16,800 | Fair |
| Hwy Fairmount Av over Water Neponset River | 1907 | 16,600 | Fair |
| Hwy Hyde Park Av over Water Mother Brook | 1991 | 16,600 | Good |
| St 3 A/hanck Onrp over Other Relief | 1970 | 16,500 | Fair |
| I 93 Ramp Kk over Hwy Hov Ramp EB | 2002 | 16,461 | Fair |
| Hwy County Rd over US 1 NE Xway | 1955 | 16,422 | Poor |
| St 28 Sb/clarendon over Comb I 90 &CSX &orng Ln | 1965 | 16,300 | Fair |
| Hwy Frontage Rd over Other Relief | 2002 | 16,100 | Fair |
| Hwy Canterbry St over RR Amtrak/mbta | 1985 | 16,034 | Poor |
| Hwy Forest Hills over Hwy Cemetery Rd | 1894 | 16,034 | Fair |
| I 93 SB on Ramp over Other Relief | 1958 | 15,647 | Fair |
| Hwy Everett St over Comb I90&CSX/MBTA&LNCLN | 1964 | 15,517 | Fair |
| Hwy Embkt WB on over Hwy Embankment Rd EB | 1951 | 15,500 | Poor |
| US 1 Ramp S-tb over Other Relief | 2001 | 15,409 | Good |
| Hwy Albany St over Comb I90 & Amtrak | 2005 | 15,300 | Fair |
| Hwy Boston St over Tr Amtrak & Red Line | 1977 | 15,300 | Poor |
| I 90 Ramp Q & Alb over I 90 Ramp H | 2005 | 15,259 | Good |
| Hwy Heath St over Comb Amtrak/mbta & Orng | 1981 | 15,250 | Fair |
| US 1 Ramp S-tb over Comb Rmp NS Ct Tl&mbta | 2001 | 15,137 | Fair |
| Hwy Mass Ave over Comb Amtrak/mbta & Orng | 1980 | 15,000 | Fair |
| St 1 A/on Ramp over Other Relief | 1951 | 15,000 | Fair |
| St 28 Nb/columbus over Comb I 90 &CSX &orng Ln | 1965 | 15,000 | Fair |
| Hwy North Rotary over St 99 Sullivan Sq Undrps | 1951 | 14,870 | Fair |
| Hwy Longwood Ave over Water Muddy River | 1897 | 14,700 | Fair |
| Hwy W Fourth St over Comb Fndry St&mbta&amtk | 1893 | 14,700 | Fair |
| Hwy Dartmouth St over Hwy I 90 | 1965 | 14,612 | Fair |
| Hwy Boston St over I 93 /US1/ST3 | 1958 | 14,500 | Fair |
| Hwy Fairmont Ave over Comb Walnut St & Mbta | 1908 | 14,483 | Fair |
| Hwy Ramp T-a/d over Hwy Relief | 2001 | 14,400 | Fair |
| Hwy Ramp T-a/d over I 90 & Ramp 1a-a/d | 2001 | 14,400 | Fair |
| I 90 EB On-ramp over Comb I90 W Onrp A & CSX | 1965 | 14,224 | Fair |
| I 93 Ramp K over I 90 & I 93 Ramp Kk | 2006 | 14,000 | Fair |
| I 93 Ramp K over Other Relief | 2004 | 14,000 | Good |
| I 93 Ramp K over Other Relief | 2004 | 14,000 | Fair |
| Hwy Sprague St over Comb Mbta & Access Rd | 1899 | 13,700 | Good |
| Hwy Central Ave over Water Neponset River | 1973 | 13,488 | Fair |
| Hwy Chelsea St over Water Chelsea River | 2012 | 13,400 | Good |
| Hwy Norfolk St over RR Mbta | 1901 | 13,400 | Fair |
| Hwy Ramp E-t over Hwy Access Road | 1996 | 13,360 | Fair |
| Hwy Ramp E-t over Hwy Ramp 1A A/d | 1996 | 13,360 | Fair |
| Hwy Ramp E-t over Hwy Ramp S-a | 1996 | 13,360 | Fair |
| Hwy W Fourth St over Water Fort Point Channel | 1958 | 13,200 | Fair |
| Hwy Ramp U-a over Hwy Ramp S-a | 2001 | 13,000 | Good |
| US 1 Cutler Hwy over Comb Trail & Linden Crk | 1937 | 12,996 | Fair |
| Hwy Broadway over RR Mbta & Silver Line | 1917 | 12,931 | Fair |
| I 93 Ramp K over Comb I93NB & Ramp Mw | 2002 | 12,563 | Fair |
| Hwy Albany Ext over I 90 Ramp H | 2005 | 12,543 | Good |
| Hwy Curtis St over RR CSX | 1906 | 12,413 | Fair |
| Hwy S Bos Bps Rd over I 93 | 1998 | 12,413 | Fair |
| St 1 A/off Ramp over Hwy M Caughlin & Relie | 1951 | 12,413 | Fair |
| I 93 Ramp Lc-n over I 93 Ramp S-n Boat | 2003 | 12,400 | Good |
| Hwy Berkeley St over I 90 | 1965 | 12,300 | Fair |
| Hwy S Bos Bypass over Hwy Wydett Cir Acc Rd | 1995 | 12,300 | Fair |
| Hwy Brookline Av over Comb I 90 & Mbta/csx | 1965 | 12,155 | Fair |
| Hwy Revere St over RR Mbta/bmrr | 2008 | 12,000 | Good |
| Hwy Washingtn St over Comb I 90 & Amtrak/mbta | 1965 | 12,000 | Fair |
| Hwy Dana Ave over Water Neponset River | 1908 | 11,900 | Good |
| Hwy Dorchstr Ave over Comb Mbta & Red Ln | 1924 | 11,800 | Poor |
| Hwy Dorchstr Ave over RR Mbta Spur | 1925 | 11,800 | Poor |
| I 93 Ramp K over Hwy W Fourth St | 2002 | 11,717 | Fair |
| Hwy Ramp X/xx over Hwy Albany St | 2003 | 11,638 | Fair |
| Hwy Ramp X/xx over Other Relief | 2000 | 11,638 | Fair |
| I 93 Ramp K over Hwy Ramp Mw & Hov EB | 2002 | 11,583 | Fair |
| I 93 Ramp Sn over Comb Mbta & Orange Line | 1999 | 11,575 | Good |
| I 93 Ramp Ll over Comb Hov EB & Amtrk&wye | 2002 | 11,522 | Fair |
| Hwy Baker St over RR Mbta/csx | 1906 | 11,121 | Fair |
| I 93 Ramp As over Hwy Broadway | 2003 | 11,120 | Fair |
| Hwy Tremont St over Comb I 90 & Amtrak | 1965 | 11,000 | Poor |
| Hwy Strw WB Onrp over Hwy Strrw Dr WB & Ofrp | 1965 | 10,925 | Fair |
| I 93 NB on Rmp over I 93 Sb/mbta Orange Ln | 1970 | 10,866 | Fair |
| Hwy Ipswich St over Water Muddy River | 1898 | 10,862 | Good |
| Hwy Squire Rd over Water Pines River | 1950 | 10,800 | Fair |
| Hwy S Bos Bypass over Comb Amtrak/mbta&red Ln | 1995 | 10,776 | Good |
| Hwy Dana Ave over RR Mbta | 1908 | 10,600 | Fair |
| Hwy Ramp 1A/D over Hwy Ramp 1a-a | 2001 | 10,600 | Fair |
| Hwy Ramp 1A/D over I 90 Ramp T-a/d Hotel D | 2001 | 10,600 | Fair |
| Hwy Ramp 1a-d over Hwy Arrival Roadway | 2001 | 10,600 | Fair |
| Hwy Ramp 1a-d over Hwy Arrival Roadway | 2001 | 10,600 | Fair |
| Hwy Ramp 1a-d over Hwy Relief | 2001 | 10,600 | Fair |
| Hwy Boylston St over Comb I 90 & Mbta/csx | 1965 | 10,300 | Poor |
| Hwy Walworth St over RR Mbta | 1918 | 10,216 | Poor |
| Hwy Belgrade Ave over RR Mbta | 1918 | 10,200 | Fair |
| Hwy Minton Rd over Comb Amtrak/mbta & Orng | 1982 | 10,183 | Fair |
| Hwy Dorchstr Ave over I 93 /US1/ST3 | 1957 | 10,100 | Fair |
| Hwy Shawmut Ave over Comb I 90 & Amtrk/orng | 1965 | 10,100 | Poor |
| Hwy Babson St over RR Mbta | 1901 | 10,000 | Good |
| I 93 Hov Ramp EB over Other Relief | 2002 | 10,000 | Good |
| Hwy Bwkr SB Onrp over Hwy Kenmore Off Rmp | 1965 | 9,900 | Poor |
| Hwy Ring Rd over I 90 & Mbta/csx | 1981 | 9,600 | Fair |
| Hwy Ramp U-d over Hwy Ramp T-u-a | 2001 | 9,400 | Fair |
| Hwy Ramp U-d over Hwy Relief | 2001 | 9,400 | Fair |
| Hwy Cedar St over Comb Amtrak/mbta & Orng | 1981 | 9,257 | Fair |
| US 1 SB Ramp over Hwy Orange St | 1956 | 9,143 | Good |
| Hwy Savin Hll Av over I 93 /US1/ST3 | 1958 | 9,100 | Fair |
| Hwy Beach St over Tr Blue Line | 1938 | 8,900 | Good |
| Hwy Dartmouth St over Tr Comm Rail & Ol | 1961 | 8,900 | Fair |
| I 93 Ramp S-n over Other Relief | 2005 | 8,800 | Fair |
| I 93 Ramp X Accs over Other Relief | 2005 | 8,793 | Good |
| Hwy Shawmut Ave over Comb Amtrak/mbta | 1932 | 8,700 | Fair |
| Hwy Harvard St over RR Mbta | 1904 | 8,500 | Good |
| Hwy Bwkr NB Ofrp over Other Relief | 1965 | 8,315 | Poor |
| Hwy Beacon St over Water Muddy River | 1900 | 8,300 | Fair |
| Hwy W Second St over Comb Haul Rd & Mbta Red | 1918 | 8,146 | Fair |
| Hwy Comm Ave WB over Water Muddy River | 1917 | 8,017 | Fair |
| Hwy Sumner St over Other Pedestrian Wlkwy | 1908 | 7,900 | Fair |
| I 90 Ramp F over I 93 Rmp Kk &infld Accs | 2004 | 7,600 | Good |
| Hwy Embkt WB Off over Hwy Embknt Eb&wb on Rp | 1951 | 7,500 | Fair |
| Hwy Harrison Ave over Comb I 90 & Amtrak/mbta | 1965 | 7,500 | Poor |
| Hwy Ramp T-a over Hwy Ramp S-a | 2001 | 7,500 | Fair |
| I 93 NB Off Ramp over Comb Red Line & Relief | 1958 | 7,400 | Fair |
| Hwy Comm Av Ofrp over Water Muddy River | 1965 | 7,300 | Poor |
| Hwy Ramp T-d over Hwy Relief | 2001 | 6,900 | Fair |
| I 93 Ramp Xxe over Hwy Broadway/ext | 2002 | 6,724 | Fair |
| Hwy Savin Hll Av over Tr Red Line | 1925 | 6,700 | Poor |
| Hwy Blakemore St over RR Amtrak/mbta | 1882 | 6,518 | Fair |
| Hwy Reservatn Rd over Water Mother Brook | 1898 | 6,466 | Good |
| Hwy Maverick St over Other Pedestrian Wlkwy | 1908 | 6,300 | Fair |
| I 93 Ramp Xx over Hwy W Fourth St | 2002 | 6,041 | Fair |
| I 93 Hov Ramp EB over I 93 Ramp Xx | 2002 | 5,900 | Fair |
| Hwy Prentiss St over Comb Amtrak/mbta & Orng | 1981 | 5,450 | Fair |
| Hwy Centre St over Comb Amtrak/mbta & Orng | 1982 | 5,400 | Fair |
| Hwy Mountain Ave over US 1 NE Xway | 1957 | 5,400 | Fair |
| Hwy Ukraine Way over RR Amtrak/mbta | 1982 | 5,400 | Fair |
| I 90 WB On-ramp E over Comb I90 W Onrp A & CSX | 1965 | 5,043 | Fair |
| I 93 Ramp Xx over Hwy Hov EB | 2001 | 4,578 | Fair |
| Hwy Frontage Rd over Comb I90 Rps&hov&amtk | 2002 | 4,534 | Good |
| Hwy Porter St over Other Pedestrian Wlkwy | 1907 | 4,300 | Fair |
| Hwy Resrvatn Rd over RR Amtrak/mbta | 1898 | 4,300 | Fair |
| Hwy Access Rd over Water Mill Creek | 1993 | 4,100 | Fair |
| Hwy Park Ave over US 1 NE Xway | 1957 | 4,050 | Poor |
| Hwy Chelsea St over Water Little Mystic Chan | 1982 | 4,008 | Fair |
| Hwy Atherton St over Comb Amtrak/mbta & Orng | 1980 | 3,500 | Fair |
| Hwy Boylston St over Comb Amtrak/mbta & Orng | 1981 | 3,500 | Fair |
| Hwy W Fourth St over Comb Haul Rd & CSX | 1918 | 3,500 | Poor |
| I 93 Hov Ramp EB over RR Amtrak | 2002 | 3,399 | Fair |
| Hwy So Sta Conn over Hwy Infield Access | 2003 | 3,362 | Good |
| Hwy Green St over Comb Amtrak/mbta & Orng | 1981 | 3,300 | Fair |
| Hwy Mcbride St over Comb Amtrak/mbta & Orng | 1982 | 3,300 | Fair |
| Hwy Shirley Ave over Tr Blue Line | 1953 | 3,300 | Fair |
| Hwy Bellevue St over RR Mbta | 1936 | 3,100 | Fair |
| Hwy Bellnghm St over RR Mbta Silver Line | 1993 | 3,100 | Good |
| Hwy St Marys St over Comb I 90 & Mbta/csx | 1965 | 2,974 | Fair |
| I 93 Hov Ramp EB over Other Relief | 2002 | 2,974 | Good |
| Hwy Mishawum St over St 99 Sullivan Sq Undrps | 1951 | 2,845 | Poor |
| Hwy Park St over RR Mbta | 1900 | 2,600 | Fair |
| I 93 Ramp Mw over Comb Hov EB & Mbta Wye | 2001 | 2,594 | Good |
| I 93 Ramp X over Hwy Broadway | 2004 | 2,546 | Good |
| I 93 Ramp Mw over Comb I90&RMP Ll Kk&amtk | 2002 | 2,521 | Fair |
| I 93 Ramp X over Hwy W Fourth St | 2004 | 2,470 | Fair |
| I 93 Ramp Kk over Other Relief | 2003 | 2,416 | Fair |
| I 93 Rmps X Xe over RR Amtrak/mbta | 2005 | 2,316 | Good |
| Hwy Nthrlnds Rd over Water Muddy River | 1892 | 2,100 | Fair |
| I 93 Ramp X over Comb Relief | 2004 | 2,066 | Good |
| I 93 Ramp X over I 90 & Ramps Cc & Kk | 2004 | 2,066 | Good |
| Hwy W Fifth St over Comb Haul Rd & Mbta Red | 1918 | 1,939 | Fair |
| I 93 Ramp X over I 90 Ramp D & Ramp Cc | 2004 | 1,939 | Good |
| Hwy W Third St over Comb Haul Rd & CSX | 1918 | 1,600 | Fair |
| Hwy Miner St over Tr Green Line D | 1906 | 1,500 | Fair |
| Hwy Gardner St over RR Mbta | 1906 | 1,400 | Fair |
| I 93 Ramp Fx over Other Relief | 2004 | 1,333 | Good |
| I 93 Ramp X over Other Relief | 2004 | 1,221 | Fair |
| Hwy Byron St over Tr Blue Line | 1950 | 1,200 | Fair |
| Hwy Quincy Shore over Other Parking | 1970 | 1,200 | Fair |
| I 93 Ramp K over Comb I90&I93RMP Cc&amtk | 2005 | 1,200 | Fair |
| Hwy Agassiz Rd over Water Muddy River | 1889 | 1,000 | Fair |
| Hwy Logan Trm B over Hwy Logan Trm B Ariv E | 1979 | 1,000 | Fair |
| Other Removed over Hwy Logan Trm B Ariv E | 1979 | 1,000 | Fair |
| I 93 Ramp Kk over Comb I90&RMP Ll Kk&amtk | 2003 | 980 | Fair |
| US 1 Rp Abut-bt50 over Hwy Arlington St | 1957 | 850 | Good |
| Hwy Medway St over Tr Red Hsl | 1928 | 800 | Fair |
| Hwy Richmond St over St 1 A/nb | 1961 | 775 | Fair |
| Hwy Redfield St over Comb Mbta&reds&frkln St | 1955 | 700 | Good |
| Hwy Viaduct St over Comb Cngrss&haul Rd&csx | 2002 | 700 | Good |
| Hwy Viaduct St over Hwy Northern Ave | 1915 | 700 | Fair |
| Hwy Williams St over Comb Amtrak/mbta & Orng | 1982 | 700 | Fair |
| Hwy Access Brg B over I 93 Ramp Kk | 2003 | 600 | Good |
| Hwy Freight Cor over Water Reserve Channel | 2017 | 597 | Good |
| I 93 Ramp E-ss over I 93 Ramp C | 2002 | 517 | Fair |
| I 93 Ramp Xx over Comb I90&I93RMP Cc&amtk | 2005 | 480 | Good |
| Hwy Acces Brg A over I 93 Ramps Cc & D | 2004 | 400 | Good |
| Hwy So Sta Conn over I 93 Ramps Cc Kk D | 2004 | 350 | Good |
| Hwy Ruggles St over Comb Amtrak/mbta & Orng | 1982 | 267 | Fair |
| Hwy Circuit Dr over Water Scarborough Pond | 1892 | 130 | Fair |
| Hwy Cedar Grove over Tr Red Hsl | 1935 | – | Fair |
| Hwy Dorchstr Ave over Tr Red Line (tunnel) | 1925 | – | Fair |
| Hwy So Sta Buswy over Comb Mbta & Relief | 1995 | – | Good |
| Hwy So Sta Conn over Comb Mbta & Relief | 1995 | – | Good |
| Hwy So Sta Conn over Hwy Frontage Rd | 1995 | – | Good |
| Hwy So Sta Conn over I 93 Ramps Cc Kk D | 2004 | – | Good |
| Hwy So Sta Ib Rp over RR Mbta | 1995 | – | Good |
| Hwy So Sta Ob Rp over Other Relief | 1995 | – | Good |
| Hwy Trm B Dep Rd over Hwy Logan Trm B Arr Rd | 1979 | – | Fair |
| I 90 EB & RP1ANB over Comb St 1A NB & Blue L | 2002 | – | Good |
| I 90 EB & RP1ANB over Hwy SR-14 | 2003 | – | Good |
| I 90 WB & RP1ASB over Comb SR-14 & Blue Line | 2002 | – | Good |
| St 1 A/& Rp E-1an over I 90 EB | 2002 | – | Good |
| St 1 A/rp 1ANB over Comb SR 14 & Blue L | 2005 | – | Good |
| St 1 A/rp E-1as over St 1 A/& Rp E-1anb | 2003 | – | Fair |
| St 1 A/rp E-1asb over Comb St 1A NB & Blue L | 2002 | – | Good |
| St 1 A/rp E-1asb over I 90 WB & SR-14 | 2002 | – | Good |