What’s that 600-foot-long tunnel-shaped structure along State Road 528? Brightline trains will run underground Rick Neale, Florida Today Tags: A 600-foot-long curved concrete structure is taking shape off State Road 528 near Canaveral Groves. Resembling a misplaced aircraft hanger, a 600-foot-long curved concrete structure is taking shape off State Road 528 near Canaveral Groves — where a newly emerged dirt ridge now towers above the nearby asphalt. Brightline is building a 30-foot-tall “fly-under” train tunnel at a large construction site just east of Interstate 95. This structure will let future passenger trains cross between the north and south sides of the Beachline Expressway — by traveling beneath vehicle traffic, News 6 partner