The executive summary of the 2001 Minnesota Department of Transportation report -- undertaken by the University of Minnesota's Department of Civil Engineering -- points to fatigue problems with the bridge's approachspan, the segments that connect the main span of the bridge to land.
This long span, made possible by the MIB High system's unique modular approach, allows developers to retain the stable vehicle processor within the RCC unit, and provides the flexibility to incorporate future consumer-demanded features to the MMX unit.