The Francis Scott Key Bridge was built in 1977.
November 18, 2024
high
temporal
Permanent attribute of the bridge's construction year.
The Francis Scott Key Bridge carried about 31,000 vehicles per day before its collapse in 2024.
November 18, 2024
high
statistic
Average daily traffic volume reported for the bridge prior to its 2024 collapse.
A 2024 NTSB assessment determined that, for the Francis Scott Key Bridge, the risk from larger-sized vessel traffic in the Patapsco River was about 30 times higher than the acceptable level, indicating the importance of vulnerability assessments for bridge safety.
March 26, 2024
high
temporal
Quantified risk finding from the NTSB's investigation related to vessel-bridge collision vulnerability.
A National Transportation Safety Board (NTSB) investigation into the March 26, 2024 collision involving the containership Dali and the Francis Scott Key Bridge found that a single loose wire in the ship's electrical system caused a circuit breaker to unexpectedly open and led to two vessel blackouts.
March 26, 2024
high
temporal
Causal finding from the NTSB investigation into the 2024 bridge collapse.
The NTSB found that a lack of effective and immediate communications to notify highway workers on the Francis Scott Key Bridge prevented timely evacuation and contributed to fatalities during the March 26, 2024 collapse.
March 26, 2024
high
temporal
Communication and emergency notification deficiency identified as a contributing factor in the 2024 bridge collapse.
The original Francis Scott Key Bridge in Baltimore was a 1.6-mile (2.6-kilometer) steel span that took five years to construct and opened to traffic in 1977.
January 01, 1977
high
temporal
Historical specifications and timeline of the original bridge.