Highway Maintenance
Background
The intersection of I-4 and Highway 408 in Orlando, Florida, is a major interchange connecting two of the busiest highways in the city. It is located just east of downtown Orlando and is a critical link in the region's transportation network. The interchange has undergone significant renovations and expansions over the years to accommodate the growing traffic volume. One notable feature of this interchange is the flyover ramp that carries traffic from westbound I-4 to eastbound Highway 408, which is one of the largest flyovers in the state.
Subsidence can cause damage to the foundations and supports of highway flyovers, leading to cracks, deformations, and other structural problems. This can weaken the structure of the flyover, potentially leading to collapse or other safety hazards.
The underlying limestone geology (karstic terrain) of Orlando is known for elevated risks of subsidence and sinkholes, highlighting the importance of satellite-based risk monitoring
Insights
A sub-circular trend of circular lakes can be interpreted as former sinkholes (dashed white circle).
Low to moderate subsidence identified around the Highway 408 flyover, within the middle of the trend.
Two smaller areas with measured subsidence intersect with the interpreted sinkhole trend.
