12 bridges with vertical clearance data on SR-3A in Massachusetts. Lowest: 141.7ft.
| Clearance | Carries | Crosses | Location | Built | Map |
|---|---|---|---|---|---|
| 141.7ft | St 3 A/Hnck Offrp | Other Relief | .2 Mi E Of I 93 | 1970 | Map |
| 144.0ft | St 3 A/Morrsy Blv | Comb Neponset Ave&River | .2 Mi E Of I 93 | 1970 | Map |
| 144.0ft | Hwy Quincy Shore | St 3 A/Hnck Nb&Mbta&Red | .2 Mi E Of I 93 | 1970 | Map |
| 144.7ft | St 3 A/Tremont St | St 3 Pilgrim Hwy | .1M East Of Jct Rte 53 | 1996 | Map |
| 146.7ft | St 3 A/Main St | St 3 Pilgrim Hwy | .8 Mi N Of Plymouth Tl | 1948 | Map |
| 148.3ft | Hwy Hancock St | Comb Sgmre St&Mbta&Reds | 1.3Km Se Of Jet I93&Nepon | 1969 | Map |
| 160.1ft | Hwy Morrssey Blv | Hwy Mt Vernon St | .16 Km W Of I 93 | 1925 | Map |
| 160.8ft | St 3 A/Gorham St | I 495 | 1.25 Mi W Rt495/Rt3 | 1962 | Map |
| 181.8ft | St 3 A/Prncetn St | Comb Bmrr & Stony Brook | 1.25 Mi N Drum Hill | 1956 | Map |
| 199.1ft | St 3 A/Cshng Hwy | Rr Mbta | Mbta/Mbcr Mp 17/811 | 1932 | Map |
| 216.5ft | St 3 A | Water Fore River | At Weymouth Twn Line | 2018 | Map |
| 236.5ft | St110 /Rte3A/Chmfd | Rr Bmrr | 15.2 M E Of Thorndike St | 1971 | Map |