I-91 Interchange 29 Exit Ramp Flyover Bridge Jigsaw Puzzle I-91 Interchange 29 Exit Ramp Flyover Bridge Uncoated weathering steel (UWS) demonstrates excellent corrosion protection--not to mention great aesthetics--over decades of service life. With its use of UWS and super-strong straddle bent design, the I-91 Interchange 29 Exit Ramp Flyover Bridge in Hartford, Conn. is built to withstand the ages. Get a closer look at the girders of our 2022 Bridge of the Year winner with our puzzle of the week!