Looking Beyond the Obvious in Florida Pedestrian Bridge Collapse
The 850-ton steel and concrete span was the centerpiece of the FIU-City of Sweetwater UniversityCity Bridge project, spanning the eight lanes of Tamiami Trail (said to be a contraction of the phrase "Tampa to Miami") connecting Florida International University in University Park to Sweetwater where over 4,000 FIU students live.
Last August, FIU freshman Alexis Dale, was crossing the roadway, known locally as Southwest Eighth Street, when she was fatally hit by a motor vehicle. That tragic incident spurred the need for a pedestrian bridge, reports ABC News.
"You can expect most coverage to treat the [bridge collapse] as a story about construction failure," writes Angie Schmitt for Streetsblog USA on Friday, the day after the tragic collapse. "But the situation begs reporters to step back and consider a broader perspective."
Indeed, Planetizen coverage (posted Sunday) highlighted the use of accelerated bridge construction (ABC) techniques, what the Miami Herald called "instant bridge," with cranes dropping the span into place on Saturday, March 10. Media coverage now centers on the discovery of a crack in the structure, and why traffic on the busy thoroughfare wasn't halted while engineers were undergoing stress testing and cable tightening.
Why no alternative to bridge construction?
Did the process to apply for federal funding require that an alternatives analysis be performed? The $14.2 million bridge, connecting plazas and walkways is part of a $19.4 million Transportation Investment Generating Economic Recovery (TIGER) grant from the U.S. Department of Transportation, according to FIU.
Southwest 8th Street is clearly too wide, and there are a number of ways to narrow crossing distances and reduce dangerous speeding, like adding concrete median islands, or replacing car lanes with wider sidewalks...Instead, the state of Florida chose a solution that would not disrupt the configuration for motorized traffic in any way: a pedestrian bridge.
While the bridge did indeed present a safe alternative to crossing the roadway at grade, it also "prioritized fast-moving cars," notes Schmitt, as did the ABC method. With no pedestrians crossing the street, no need for those long pedestrian count-down signals.
Separating pedestrians from motor vehicle traffic rather than integrating the two modes fits in well with the university's transportation paradigm, observes Schmitt.
The FIU campus is designed around the movement and storage of cars and is dominated by parking [jpg]. Locals tell us that there is really no transit access to the university except for a couple of out-of-the-way bus stops.
In 2015, the Miami-Dade Metropolitan Planning Organization released a study [pdf] of the 8th Street corridor. Though it mentioned the FIU campus, the report focuses almost exclusively on speeding up car traffic, not pedestrian safety. The planning agency rejected the addition of bus lanes and instead elected to make the road more like a highway, with grade separations at two intersections.
Schmitt concludes by writing that "[a]n effective approach to traffic safety would consider the dangerous conditions for pedestrians that led to the construction of the bridge in the first place. If we don’t think critically about these systemic risks, our transportation networks will keep on failing at public safety."
As of Sunday, the death toll stands at six. All victims have been recovered.
Hat tip to Len Conly via Sierra Club transportation forum.
- United States
- Miami-Dade County
- Accelerated Bridge Construction
- Alternatives Analysis
- Bridge Collapse
- Pedestrian Safety
- FIU-Sweetwater UniversityCity Bridge
- Florida International University
- Miami-Dade Metropolitan Planning Organization
- Tamiami Trail
- Angie Schmitt