A rare 'turbine' configuration features sweeping ramps that should be easier to build and maintain than those in standard stacked interchanges. Related Links: More ENR Transportation News The upgrade of the existing Interstate 85/485 interchange near Charlotte, N.C., is proof that a bigger design can actually mean bigger savings.Part of the North Carolina Dept. of Transportation's (NCDOT) program to fill the last six-mile gap in the 65-mile I-485 outer loop around Charlotte, the interchange uses a two-level "turbine" configuration rarely found in the U.S.
The market is generally healthy and steadily growing, and margins are up for large specialty contractors. Further, advances in design tools and owner demand for collaboration are giving subcontractors a seat at the table early on in projects.