America's Most Dangerous Bridges
No. 20 I-495 NB over abandoned railroad, Amesbury, MA
This three-lane bridge built in 1964 was given a “poor” rating for both its deck and its superstructure, which supports the precast concrete deck that cars travel over. Two arched replacement bridges are in the design phase for this and its matching span in the opposite direction, but construction won’t begin until 2015.